/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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:41:34,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:41:34,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:41:34,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:41:34,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:41:34,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:41:34,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:41:34,502 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 23:41:34,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:41:34,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:41:34,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:41:34,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:41:34,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:41:34,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:41:34,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:41:34,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:41:34,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:41:34,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:41:34,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:41:34,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:41:34,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:41:34,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:41:34,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:41:34,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:41:34,529 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:41:34,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:41:34,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:41:34,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:41:34,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:41:34,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:41:34,939 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:41:34,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2021-05-02 23:41:35,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa468a61b/af0dc6a4c85a4628a65746a86bc3b7c9/FLAGfa64ec0ab [2021-05-02 23:41:35,595 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:41:35,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2021-05-02 23:41:35,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa468a61b/af0dc6a4c85a4628a65746a86bc3b7c9/FLAGfa64ec0ab [2021-05-02 23:41:35,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa468a61b/af0dc6a4c85a4628a65746a86bc3b7c9 [2021-05-02 23:41:35,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:41:35,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:41:35,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:41:35,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:41:35,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:41:35,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:41:35" (1/1) ... [2021-05-02 23:41:35,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a623cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:35, skipping insertion in model container [2021-05-02 23:41:35,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:41:35" (1/1) ... [2021-05-02 23:41:36,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:41:36,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:41:36,221 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.i[895,908] [2021-05-02 23:41:36,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:41:36,247 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:41:36,264 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.i[895,908] [2021-05-02 23:41:36,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:41:36,287 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:41:36,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36 WrapperNode [2021-05-02 23:41:36,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:41:36,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:41:36,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:41:36,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:41:36,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (1/1) ... [2021-05-02 23:41:36,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:41:36,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:41:36,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:41:36,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:41:36,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (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 23:41:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:41:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:41:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:41:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:41:36,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:41:36,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:41:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:41:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:41:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:41:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:41:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:41:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:41:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:41:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:41:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:41:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:41:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:41:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:41:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:41:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:41:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:41:36,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:41:36,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:41:36,896 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:41:36,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:41:36 BoogieIcfgContainer [2021-05-02 23:41:36,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:41:36,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:41:36,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:41:36,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:41:36,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:41:35" (1/3) ... [2021-05-02 23:41:36,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a9fa35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:41:36, skipping insertion in model container [2021-05-02 23:41:36,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:41:36" (2/3) ... [2021-05-02 23:41:36,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a9fa35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:41:36, skipping insertion in model container [2021-05-02 23:41:36,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:41:36" (3/3) ... [2021-05-02 23:41:36,906 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2021-05-02 23:41:36,927 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:41:36,931 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:41:36,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:41:37,019 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:41:37,020 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:41:37,020 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:41:37,020 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:41:37,020 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:41:37,020 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:41:37,020 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:41:37,020 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:41:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:41:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:41:37,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:37,052 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:37,052 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash -242008288, now seen corresponding path program 1 times [2021-05-02 23:41:37,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:37,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727287321] [2021-05-02 23:41:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:37,138 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:41:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:37,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:37,376 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:37,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727287321] [2021-05-02 23:41:37,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [727287321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:37,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:37,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:41:37,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217545105] [2021-05-02 23:41:37,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:41:37,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:41:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:41:37,405 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:37,507 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 23:41:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:41:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:41:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:37,517 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:41:37,517 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:41:37,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:41:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:41:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:41:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-02 23:41:37,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-02 23:41:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:37,578 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-02 23:41:37,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-02 23:41:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:41:37,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:37,580 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:37,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:41:37,581 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash -251243498, now seen corresponding path program 1 times [2021-05-02 23:41:37,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:37,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605967016] [2021-05-02 23:41:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:37,598 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:41:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:37,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:37,764 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:37,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605967016] [2021-05-02 23:41:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605967016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:37,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:37,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:41:37,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532074994] [2021-05-02 23:41:37,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:41:37,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:37,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:41:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:41:37,771 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:37,885 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-05-02 23:41:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:41:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:41:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:37,889 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:41:37,889 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:41:37,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:41:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:41:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:41:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 23:41:37,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-02 23:41:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:37,910 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 23:41:37,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 23:41:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:41:37,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:37,913 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:37,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:41:37,913 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:37,915 INFO L82 PathProgramCache]: Analyzing trace with hash 85580979, now seen corresponding path program 1 times [2021-05-02 23:41:37,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:37,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833621179] [2021-05-02 23:41:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:37,988 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_9 50) InVars {main_~x~0=v_main_~x~0_9} OutVars{main_~x~0=v_main_~x~0_9} AuxVars[] AssignedVars[] [2021-05-02 23:41:38,012 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:38,020 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:38,073 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:38,113 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:38,152 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:38,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:38,350 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833621179] [2021-05-02 23:41:38,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [833621179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:38,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:38,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:41:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886695496] [2021-05-02 23:41:38,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:41:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:41:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:41:38,354 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:38,502 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-05-02 23:41:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:41:38,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:41:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:38,503 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:41:38,503 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:41:38,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:41:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:41:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:41:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 23:41:38,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 23:41:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:38,510 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 23:41:38,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 23:41:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:41:38,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:38,511 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:38,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:41:38,511 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1651356176, now seen corresponding path program 2 times [2021-05-02 23:41:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:38,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984789233] [2021-05-02 23:41:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:38,535 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_13 99) (< v_main_~x~0_13 50)) InVars {main_~x~0=v_main_~x~0_13} OutVars{main_~x~0=v_main_~x~0_13} AuxVars[] AssignedVars[] [2021-05-02 23:41:38,556 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:38,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:38,568 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:38,628 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:38,649 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:38,654 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_15 50) InVars {main_~x~0=v_main_~x~0_15} OutVars{main_~x~0=v_main_~x~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:41:38,659 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:38,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:38,691 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:38,703 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:38,716 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:38,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:38,865 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:38,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984789233] [2021-05-02 23:41:38,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [984789233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:38,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:38,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:41:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902446320] [2021-05-02 23:41:38,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:41:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:41:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:41:38,868 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:39,045 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-02 23:41:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:41:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:41:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:39,047 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:41:39,047 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:41:39,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:41:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:41:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 23:41:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 23:41:39,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-05-02 23:41:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:39,054 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 23:41:39,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 23:41:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:41:39,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:39,055 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:39,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:41:39,055 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1172200403, now seen corresponding path program 3 times [2021-05-02 23:41:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:39,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52275873] [2021-05-02 23:41:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:39,066 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_20 50) (< v_main_~x~0_20 99)) InVars {main_~x~0=v_main_~x~0_20} OutVars{main_~x~0=v_main_~x~0_20} AuxVars[] AssignedVars[] [2021-05-02 23:41:39,072 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:39,082 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:39,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:39,104 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:39,119 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:39,127 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_22 50) InVars {main_~x~0=v_main_~x~0_22} OutVars{main_~x~0=v_main_~x~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:41:39,133 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:39,137 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:39,146 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:39,169 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:39,184 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:39,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:39,350 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:39,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52275873] [2021-05-02 23:41:39,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [52275873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:39,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:39,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:41:39,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271161162] [2021-05-02 23:41:39,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:41:39,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:39,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:41:39,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:41:39,362 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:39,550 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 23:41:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:41:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:41:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:39,555 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:41:39,555 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:41:39,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:41:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:41:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 23:41:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-05-02 23:41:39,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-05-02 23:41:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:39,569 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-05-02 23:41:39,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-05-02 23:41:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:41:39,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:39,571 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:39,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:41:39,572 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash -190741750, now seen corresponding path program 4 times [2021-05-02 23:41:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:39,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199175830] [2021-05-02 23:41:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:39,581 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_28 50) (< v_main_~x~0_28 99)) InVars {main_~x~0=v_main_~x~0_28} OutVars{main_~x~0=v_main_~x~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:41:39,591 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:39,593 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:39,603 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:39,641 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:39,660 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:39,672 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_30 50) InVars {main_~x~0=v_main_~x~0_30} OutVars{main_~x~0=v_main_~x~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:41:39,684 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:39,697 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:39,708 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:39,760 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:39,775 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:39,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:39,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:39,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199175830] [2021-05-02 23:41:39,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [199175830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:39,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:39,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:41:39,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793398347] [2021-05-02 23:41:39,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:41:39,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:39,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:41:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:41:39,954 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:40,204 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 23:41:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:41:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:41:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:40,206 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:41:40,207 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:41:40,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:41:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:41:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 23:41:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 23:41:40,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2021-05-02 23:41:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:40,215 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 23:41:40,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 23:41:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:41:40,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:40,216 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:40,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:41:40,217 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1901781337, now seen corresponding path program 5 times [2021-05-02 23:41:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:40,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713349927] [2021-05-02 23:41:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:40,235 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_37 50) (< v_main_~x~0_37 99)) InVars {main_~x~0=v_main_~x~0_37} OutVars{main_~x~0=v_main_~x~0_37} AuxVars[] AssignedVars[] [2021-05-02 23:41:40,245 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:40,253 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:40,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:40,295 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:40,311 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:40,316 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_39 50) InVars {main_~x~0=v_main_~x~0_39} OutVars{main_~x~0=v_main_~x~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:41:40,323 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:40,339 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:40,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:40,374 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:40,388 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:40,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:40,574 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:40,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713349927] [2021-05-02 23:41:40,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [713349927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:40,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:40,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:41:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687868021] [2021-05-02 23:41:40,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:41:40,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:41:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:41:40,577 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:40,831 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 23:41:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:41:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:41:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:40,833 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:41:40,833 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:41:40,834 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:41:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:41:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 23:41:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-05-02 23:41:40,839 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-05-02 23:41:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:40,840 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-05-02 23:41:40,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-05-02 23:41:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:41:40,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:40,841 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:40,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:41:40,841 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1238350076, now seen corresponding path program 6 times [2021-05-02 23:41:40,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:40,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268535359] [2021-05-02 23:41:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:40,849 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_47 50) (< v_main_~x~0_47 99)) InVars {main_~x~0=v_main_~x~0_47} OutVars{main_~x~0=v_main_~x~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:41:40,852 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:40,859 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:40,869 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:40,880 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:40,891 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:40,895 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_49 50) InVars {main_~x~0=v_main_~x~0_49} OutVars{main_~x~0=v_main_~x~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:41:40,898 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:40,906 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:40,913 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:40,921 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:40,933 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:40,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:41,101 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:41,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268535359] [2021-05-02 23:41:41,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [268535359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:41,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:41,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:41:41,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133059609] [2021-05-02 23:41:41,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:41:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:41,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:41:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:41:41,105 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:41,386 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 23:41:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:41:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:41:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:41,388 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:41:41,388 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:41:41,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:41:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:41:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 23:41:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-02 23:41:41,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-05-02 23:41:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:41,395 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-02 23:41:41,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-02 23:41:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:41:41,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:41,397 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:41,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:41:41,397 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash 663931937, now seen corresponding path program 7 times [2021-05-02 23:41:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:41,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063329202] [2021-05-02 23:41:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:41,408 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_58 99) (< v_main_~x~0_58 50)) InVars {main_~x~0=v_main_~x~0_58} OutVars{main_~x~0=v_main_~x~0_58} AuxVars[] AssignedVars[] [2021-05-02 23:41:41,411 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:41,419 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:41,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:41,437 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:41,459 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:41,467 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_60 50) InVars {main_~x~0=v_main_~x~0_60} OutVars{main_~x~0=v_main_~x~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:41:41,474 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:41,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:41,495 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:41,504 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:41,514 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:41,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:41,677 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063329202] [2021-05-02 23:41:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063329202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:41,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:41,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:41:41,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913481355] [2021-05-02 23:41:41,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:41:41,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:41:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:41:41,679 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:42,017 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 23:41:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:41:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:41:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:42,020 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:41:42,020 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:41:42,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:41:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:41:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 23:41:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 23:41:42,032 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-05-02 23:41:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:42,034 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 23:41:42,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 23:41:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:41:42,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:42,036 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:42,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:41:42,036 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -899121666, now seen corresponding path program 8 times [2021-05-02 23:41:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672866536] [2021-05-02 23:41:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:42,047 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_70 50) (< v_main_~x~0_70 99)) InVars {main_~x~0=v_main_~x~0_70} OutVars{main_~x~0=v_main_~x~0_70} AuxVars[] AssignedVars[] [2021-05-02 23:41:42,050 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:42,053 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:42,061 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:42,079 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:42,092 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:42,095 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_72 50) InVars {main_~x~0=v_main_~x~0_72} OutVars{main_~x~0=v_main_~x~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:41:42,098 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:42,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:42,111 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:42,119 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:42,129 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:42,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:42,171 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 23:41:42,286 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:42,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672866536] [2021-05-02 23:41:42,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672866536] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:42,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:42,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:41:42,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896322544] [2021-05-02 23:41:42,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:41:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:41:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:41:42,289 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:42,649 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-05-02 23:41:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:41:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:41:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:42,650 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:41:42,651 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:41:42,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:41:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:41:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 23:41:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-02 23:41:42,658 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2021-05-02 23:41:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:42,658 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-02 23:41:42,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-02 23:41:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:41:42,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:42,659 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:42,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:41:42,660 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 244919451, now seen corresponding path program 9 times [2021-05-02 23:41:42,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:42,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162312769] [2021-05-02 23:41:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:42,669 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_83 99) (< v_main_~x~0_83 50)) InVars {main_~x~0=v_main_~x~0_83} OutVars{main_~x~0=v_main_~x~0_83} AuxVars[] AssignedVars[] [2021-05-02 23:41:42,672 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:42,674 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:42,680 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:42,694 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:42,706 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:42,711 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_85 50) InVars {main_~x~0=v_main_~x~0_85} OutVars{main_~x~0=v_main_~x~0_85} AuxVars[] AssignedVars[] [2021-05-02 23:41:42,713 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:42,722 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:42,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:42,737 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:42,748 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:42,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:42,953 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:42,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162312769] [2021-05-02 23:41:42,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162312769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:42,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:42,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:41:42,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861307706] [2021-05-02 23:41:42,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:41:42,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:42,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:41:42,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:41:42,955 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:43,349 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-05-02 23:41:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:41:43,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:41:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:43,351 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:41:43,351 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:41:43,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:41:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:41:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 23:41:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-02 23:41:43,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-05-02 23:41:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:43,358 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-02 23:41:43,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-02 23:41:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:41:43,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:43,359 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:43,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:41:43,360 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash 156805112, now seen corresponding path program 10 times [2021-05-02 23:41:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:43,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302006786] [2021-05-02 23:41:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:43,366 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_97 50) (< v_main_~x~0_97 99)) InVars {main_~x~0=v_main_~x~0_97} OutVars{main_~x~0=v_main_~x~0_97} AuxVars[] AssignedVars[] [2021-05-02 23:41:43,369 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:43,376 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:43,386 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:43,395 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:43,406 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:43,410 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_99 50) InVars {main_~x~0=v_main_~x~0_99} OutVars{main_~x~0=v_main_~x~0_99} AuxVars[] AssignedVars[] [2021-05-02 23:41:43,414 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:43,430 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:43,436 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:43,447 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:43,458 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:43,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:43,510 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 23:41:43,703 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:43,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302006786] [2021-05-02 23:41:43,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [302006786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:43,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:43,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:41:43,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012878551] [2021-05-02 23:41:43,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:41:43,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:41:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:41:43,706 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:44,399 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 23:41:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:41:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:41:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:44,403 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:41:44,404 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:41:44,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 544.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:41:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:41:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 23:41:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 23:41:44,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2021-05-02 23:41:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:44,416 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 23:41:44,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 23:41:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:41:44,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:44,418 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:44,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:41:44,419 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1378271253, now seen corresponding path program 11 times [2021-05-02 23:41:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:44,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902892087] [2021-05-02 23:41:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:44,431 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_112 50) (< v_main_~x~0_112 99)) InVars {main_~x~0=v_main_~x~0_112} OutVars{main_~x~0=v_main_~x~0_112} AuxVars[] AssignedVars[] [2021-05-02 23:41:44,435 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:44,438 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:44,449 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:44,478 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:44,493 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:44,499 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_114 50) InVars {main_~x~0=v_main_~x~0_114} OutVars{main_~x~0=v_main_~x~0_114} AuxVars[] AssignedVars[] [2021-05-02 23:41:44,503 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:44,515 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:44,525 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:44,539 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:44,553 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:44,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:44,859 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902892087] [2021-05-02 23:41:44,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1902892087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:44,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:44,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:41:44,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706329277] [2021-05-02 23:41:44,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:41:44,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:41:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:41:44,863 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:45,583 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 23:41:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:41:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:41:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:45,585 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:41:45,585 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:41:45,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:41:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:41:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 23:41:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-02 23:41:45,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2021-05-02 23:41:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:45,597 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-02 23:41:45,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-02 23:41:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:41:45,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:45,599 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:45,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:41:45,600 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1613806350, now seen corresponding path program 12 times [2021-05-02 23:41:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:45,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32753429] [2021-05-02 23:41:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:45,612 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_128 99) (< v_main_~x~0_128 50)) InVars {main_~x~0=v_main_~x~0_128} OutVars{main_~x~0=v_main_~x~0_128} AuxVars[] AssignedVars[] [2021-05-02 23:41:45,618 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:45,634 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:45,661 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:45,678 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:45,684 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_130 50) InVars {main_~x~0=v_main_~x~0_130} OutVars{main_~x~0=v_main_~x~0_130} AuxVars[] AssignedVars[] [2021-05-02 23:41:45,689 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:45,702 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,714 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:45,728 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:45,745 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:45,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:46,073 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:46,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32753429] [2021-05-02 23:41:46,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [32753429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:46,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:46,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:41:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947482401] [2021-05-02 23:41:46,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:41:46,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:41:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:41:46,078 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:46,863 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-02 23:41:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:41:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:41:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:46,865 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:41:46,865 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:41:46,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:41:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:41:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 23:41:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-02 23:41:46,873 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2021-05-02 23:41:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:46,873 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-02 23:41:46,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-02 23:41:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:41:46,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:46,874 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:46,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:41:46,874 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 627705487, now seen corresponding path program 13 times [2021-05-02 23:41:46,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:46,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593568764] [2021-05-02 23:41:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:46,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_145 50) (< v_main_~x~0_145 99)) InVars {main_~x~0=v_main_~x~0_145} OutVars{main_~x~0=v_main_~x~0_145} AuxVars[] AssignedVars[] [2021-05-02 23:41:46,886 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:46,887 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:46,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:46,913 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:46,924 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:46,927 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_147 50) InVars {main_~x~0=v_main_~x~0_147} OutVars{main_~x~0=v_main_~x~0_147} AuxVars[] AssignedVars[] [2021-05-02 23:41:46,930 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:46,939 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:46,946 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:46,956 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:46,968 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:47,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:47,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:47,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593568764] [2021-05-02 23:41:47,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593568764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:47,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:47,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:41:47,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523140862] [2021-05-02 23:41:47,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:41:47,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:41:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:41:47,211 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:47,812 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-02 23:41:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:41:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 23:41:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:47,814 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:41:47,814 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:41:47,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:41:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:41:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 23:41:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 23:41:47,821 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2021-05-02 23:41:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:47,821 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 23:41:47,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:47,821 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 23:41:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:41:47,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:47,822 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:47,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:41:47,822 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1353001748, now seen corresponding path program 14 times [2021-05-02 23:41:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:47,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204621335] [2021-05-02 23:41:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:47,830 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_163 99) (< v_main_~x~0_163 50)) InVars {main_~x~0=v_main_~x~0_163} OutVars{main_~x~0=v_main_~x~0_163} AuxVars[] AssignedVars[] [2021-05-02 23:41:47,833 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:47,834 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:47,840 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:47,853 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:47,863 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:47,874 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_165 50) InVars {main_~x~0=v_main_~x~0_165} OutVars{main_~x~0=v_main_~x~0_165} AuxVars[] AssignedVars[] [2021-05-02 23:41:47,877 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:47,885 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:47,891 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:47,900 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:47,910 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:47,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:48,178 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:48,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204621335] [2021-05-02 23:41:48,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204621335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:48,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:48,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:41:48,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041187518] [2021-05-02 23:41:48,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:41:48,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:48,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:41:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:41:48,180 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:48,846 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 23:41:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:41:48,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:41:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:48,848 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:41:48,848 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:41:48,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:41:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:41:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 23:41:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 23:41:48,856 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2021-05-02 23:41:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:48,856 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 23:41:48,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 23:41:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:41:48,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:48,858 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:48,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:41:48,858 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2142142455, now seen corresponding path program 15 times [2021-05-02 23:41:48,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:48,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556777249] [2021-05-02 23:41:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:48,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_182 99) (< v_main_~x~0_182 50)) InVars {main_~x~0=v_main_~x~0_182} OutVars{main_~x~0=v_main_~x~0_182} AuxVars[] AssignedVars[] [2021-05-02 23:41:48,870 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:48,871 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:48,878 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:48,895 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:48,907 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:48,911 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_184 50) InVars {main_~x~0=v_main_~x~0_184} OutVars{main_~x~0=v_main_~x~0_184} AuxVars[] AssignedVars[] [2021-05-02 23:41:48,913 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:48,926 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:48,933 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:48,942 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:48,953 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:49,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:49,237 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:49,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556777249] [2021-05-02 23:41:49,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1556777249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:49,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:49,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:41:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360676638] [2021-05-02 23:41:49,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:41:49,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:41:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:41:49,242 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:50,010 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 23:41:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:41:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 23:41:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:50,013 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:41:50,013 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:41:50,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:41:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:41:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 23:41:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 23:41:50,027 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2021-05-02 23:41:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:50,027 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 23:41:50,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 23:41:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:41:50,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:50,031 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:50,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:41:50,031 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -297150490, now seen corresponding path program 16 times [2021-05-02 23:41:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:50,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440072527] [2021-05-02 23:41:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:50,042 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_202 50) (< v_main_~x~0_202 99)) InVars {main_~x~0=v_main_~x~0_202} OutVars{main_~x~0=v_main_~x~0_202} AuxVars[] AssignedVars[] [2021-05-02 23:41:50,045 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:50,054 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:50,067 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:50,076 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:50,087 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:50,101 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_204 50) InVars {main_~x~0=v_main_~x~0_204} OutVars{main_~x~0=v_main_~x~0_204} AuxVars[] AssignedVars[] [2021-05-02 23:41:50,106 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:50,114 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:50,122 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:50,129 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:50,139 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:50,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:50,426 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:50,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440072527] [2021-05-02 23:41:50,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440072527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:50,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:50,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:41:50,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940813001] [2021-05-02 23:41:50,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:41:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:41:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:41:50,429 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:51,204 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-05-02 23:41:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:41:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 23:41:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:51,206 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:41:51,206 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:41:51,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:41:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:41:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 23:41:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-02 23:41:51,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2021-05-02 23:41:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:51,214 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-02 23:41:51,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-02 23:41:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:41:51,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:51,215 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:51,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:41:51,215 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:51,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1081365373, now seen corresponding path program 17 times [2021-05-02 23:41:51,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:51,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850558921] [2021-05-02 23:41:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:51,222 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_223 99) (< v_main_~x~0_223 50)) InVars {main_~x~0=v_main_~x~0_223} OutVars{main_~x~0=v_main_~x~0_223} AuxVars[] AssignedVars[] [2021-05-02 23:41:51,224 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:51,232 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:51,238 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:51,247 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:51,259 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:51,261 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_225 50) InVars {main_~x~0=v_main_~x~0_225} OutVars{main_~x~0=v_main_~x~0_225} AuxVars[] AssignedVars[] [2021-05-02 23:41:51,269 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:51,270 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:51,276 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:51,291 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:51,302 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:51,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:51,692 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850558921] [2021-05-02 23:41:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1850558921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:51,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:51,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:41:51,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29537724] [2021-05-02 23:41:51,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:41:51,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:41:51,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:41:51,695 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:52,728 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-05-02 23:41:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:41:52,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:41:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:52,730 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:41:52,730 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:41:52,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:41:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:41:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 23:41:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-05-02 23:41:52,743 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2021-05-02 23:41:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:52,744 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-05-02 23:41:52,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-05-02 23:41:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:41:52,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:52,745 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:52,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:41:52,745 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1202376160, now seen corresponding path program 18 times [2021-05-02 23:41:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:52,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942903774] [2021-05-02 23:41:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:52,762 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_245 50) (< v_main_~x~0_245 99)) InVars {main_~x~0=v_main_~x~0_245} OutVars{main_~x~0=v_main_~x~0_245} AuxVars[] AssignedVars[] [2021-05-02 23:41:52,765 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:52,767 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:52,775 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:52,797 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:52,808 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:52,810 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_247 50) InVars {main_~x~0=v_main_~x~0_247} OutVars{main_~x~0=v_main_~x~0_247} AuxVars[] AssignedVars[] [2021-05-02 23:41:52,814 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:52,815 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:52,825 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:52,844 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:52,856 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:52,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:53,222 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942903774] [2021-05-02 23:41:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942903774] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:53,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:53,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:41:53,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699411288] [2021-05-02 23:41:53,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:41:53,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:41:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:41:53,225 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:54,247 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-05-02 23:41:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:41:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 23:41:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:54,248 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:41:54,248 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:41:54,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:41:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:41:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 23:41:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-02 23:41:54,257 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2021-05-02 23:41:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:54,257 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-02 23:41:54,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-02 23:41:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:41:54,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:54,258 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:54,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:41:54,259 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1149701117, now seen corresponding path program 19 times [2021-05-02 23:41:54,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:54,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812690368] [2021-05-02 23:41:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:54,265 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_268 99) (< v_main_~x~0_268 50)) InVars {main_~x~0=v_main_~x~0_268} OutVars{main_~x~0=v_main_~x~0_268} AuxVars[] AssignedVars[] [2021-05-02 23:41:54,268 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:54,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:54,283 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:54,292 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:54,303 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:54,306 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_270 50) InVars {main_~x~0=v_main_~x~0_270} OutVars{main_~x~0=v_main_~x~0_270} AuxVars[] AssignedVars[] [2021-05-02 23:41:54,311 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:54,312 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:54,319 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:54,337 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:54,349 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:54,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:54,742 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:54,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812690368] [2021-05-02 23:41:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [812690368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:54,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:54,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:41:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524679138] [2021-05-02 23:41:54,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:41:54,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:41:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:41:54,748 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:55,863 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-05-02 23:41:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:41:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 23:41:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:55,865 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:41:55,865 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:41:55,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 893.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:41:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:41:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 23:41:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 23:41:55,874 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2021-05-02 23:41:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:55,874 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 23:41:55,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 23:41:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:41:55,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:55,875 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:55,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:41:55,876 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2068592346, now seen corresponding path program 20 times [2021-05-02 23:41:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:55,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862891634] [2021-05-02 23:41:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:55,882 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_292 99) (< v_main_~x~0_292 50)) InVars {main_~x~0=v_main_~x~0_292} OutVars{main_~x~0=v_main_~x~0_292} AuxVars[] AssignedVars[] [2021-05-02 23:41:55,885 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:55,894 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:55,901 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:55,911 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:55,922 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:55,925 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_294 50) InVars {main_~x~0=v_main_~x~0_294} OutVars{main_~x~0=v_main_~x~0_294} AuxVars[] AssignedVars[] [2021-05-02 23:41:55,928 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:55,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:55,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:55,953 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:55,965 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:56,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:56,357 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862891634] [2021-05-02 23:41:56,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [862891634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:56,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:56,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:41:56,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095201107] [2021-05-02 23:41:56,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:41:56,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:56,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:41:56,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:41:56,360 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:57,449 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-05-02 23:41:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:41:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:41:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:57,450 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:41:57,450 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:41:57,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 934.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:41:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:41:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 23:41:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-02 23:41:57,456 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2021-05-02 23:41:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:57,456 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-02 23:41:57,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-02 23:41:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:41:57,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:57,457 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:57,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:41:57,457 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:57,458 INFO L82 PathProgramCache]: Analyzing trace with hash 359800439, now seen corresponding path program 21 times [2021-05-02 23:41:57,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:57,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593949152] [2021-05-02 23:41:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:57,464 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_317 50) (< v_main_~x~0_317 99)) InVars {main_~x~0=v_main_~x~0_317} OutVars{main_~x~0=v_main_~x~0_317} AuxVars[] AssignedVars[] [2021-05-02 23:41:57,467 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:57,474 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:57,479 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:57,486 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:57,496 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:57,500 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_319 50) InVars {main_~x~0=v_main_~x~0_319} OutVars{main_~x~0=v_main_~x~0_319} AuxVars[] AssignedVars[] [2021-05-02 23:41:57,501 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:57,502 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:57,508 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:57,521 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:57,532 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:57,910 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:57,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593949152] [2021-05-02 23:41:57,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [593949152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:57,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:57,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:41:57,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621794262] [2021-05-02 23:41:57,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:41:57,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:41:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:41:57,913 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:58,956 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-05-02 23:41:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:41:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 23:41:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:58,957 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:41:58,958 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:41:58,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 862.2ms TimeCoverageRelationStatistics Valid=185, Invalid=2167, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:41:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:41:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 23:41:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-05-02 23:41:58,969 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2021-05-02 23:41:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:58,970 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-05-02 23:41:58,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-05-02 23:41:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:41:58,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:58,971 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:58,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:41:58,971 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:58,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1111715116, now seen corresponding path program 22 times [2021-05-02 23:41:58,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:58,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017283419] [2021-05-02 23:41:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:58,978 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_343 50) (< v_main_~x~0_343 99)) InVars {main_~x~0=v_main_~x~0_343} OutVars{main_~x~0=v_main_~x~0_343} AuxVars[] AssignedVars[] [2021-05-02 23:41:58,981 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:58,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:58,995 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:59,003 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:59,013 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:59,016 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_345 50) InVars {main_~x~0=v_main_~x~0_345} OutVars{main_~x~0=v_main_~x~0_345} AuxVars[] AssignedVars[] [2021-05-02 23:41:59,020 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:59,021 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:59,029 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:59,043 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:59,055 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:59,472 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:59,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017283419] [2021-05-02 23:41:59,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017283419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:59,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:59,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:41:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735959734] [2021-05-02 23:41:59,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:41:59,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:41:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:41:59,474 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:00,561 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-05-02 23:42:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:42:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 23:42:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:00,562 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:42:00,562 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:42:00,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 921.4ms TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:42:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:42:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 23:42:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-02 23:42:00,569 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2021-05-02 23:42:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:00,569 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-02 23:42:00,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-02 23:42:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:42:00,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:00,570 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:00,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:42:00,570 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2101044209, now seen corresponding path program 23 times [2021-05-02 23:42:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:00,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949839963] [2021-05-02 23:42:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:00,577 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_370 99) (< v_main_~x~0_370 50)) InVars {main_~x~0=v_main_~x~0_370} OutVars{main_~x~0=v_main_~x~0_370} AuxVars[] AssignedVars[] [2021-05-02 23:42:00,580 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:00,588 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:00,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:00,600 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:00,609 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:00,612 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_372 50) InVars {main_~x~0=v_main_~x~0_372} OutVars{main_~x~0=v_main_~x~0_372} AuxVars[] AssignedVars[] [2021-05-02 23:42:00,613 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:00,614 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:00,622 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:00,633 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:00,642 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:00,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:00,681 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 23:42:01,054 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949839963] [2021-05-02 23:42:01,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [949839963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:01,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:01,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:42:01,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076917572] [2021-05-02 23:42:01,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:42:01,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:01,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:42:01,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:42:01,057 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:02,254 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-05-02 23:42:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:42:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 23:42:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:02,256 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:42:02,256 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:42:02,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 965.6ms TimeCoverageRelationStatistics Valid=201, Invalid=2555, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:42:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:42:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 23:42:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 23:42:02,265 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2021-05-02 23:42:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:02,265 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 23:42:02,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 23:42:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:42:02,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:02,266 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:02,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:42:02,267 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:02,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1481269710, now seen corresponding path program 24 times [2021-05-02 23:42:02,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:02,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129959828] [2021-05-02 23:42:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:02,274 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_398 50) (< v_main_~x~0_398 99)) InVars {main_~x~0=v_main_~x~0_398} OutVars{main_~x~0=v_main_~x~0_398} AuxVars[] AssignedVars[] [2021-05-02 23:42:02,276 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:02,284 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,291 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:02,298 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:02,308 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:02,310 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_400 50) InVars {main_~x~0=v_main_~x~0_400} OutVars{main_~x~0=v_main_~x~0_400} AuxVars[] AssignedVars[] [2021-05-02 23:42:02,322 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:02,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:02,346 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:02,357 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:02,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:02,423 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 23:42:02,835 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:02,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129959828] [2021-05-02 23:42:02,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129959828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:02,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:02,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:42:02,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505261336] [2021-05-02 23:42:02,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:42:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:42:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:42:02,838 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:04,185 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-05-02 23:42:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:42:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 23:42:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:04,186 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:42:04,186 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:42:04,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1068.6ms TimeCoverageRelationStatistics Valid=209, Invalid=2761, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:42:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:42:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 23:42:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-02 23:42:04,195 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2021-05-02 23:42:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:04,195 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-02 23:42:04,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-02 23:42:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:42:04,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:04,196 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:04,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:42:04,196 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1416536981, now seen corresponding path program 25 times [2021-05-02 23:42:04,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:04,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117731241] [2021-05-02 23:42:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:04,204 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_427 99) (< v_main_~x~0_427 50)) InVars {main_~x~0=v_main_~x~0_427} OutVars{main_~x~0=v_main_~x~0_427} AuxVars[] AssignedVars[] [2021-05-02 23:42:04,206 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:04,208 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:04,214 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:04,228 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:04,239 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:04,241 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_429 50) InVars {main_~x~0=v_main_~x~0_429} OutVars{main_~x~0=v_main_~x~0_429} AuxVars[] AssignedVars[] [2021-05-02 23:42:04,244 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:04,245 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:04,252 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:04,268 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:04,278 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:04,819 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:04,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117731241] [2021-05-02 23:42:04,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117731241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:04,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:04,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:42:04,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985312049] [2021-05-02 23:42:04,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:42:04,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:04,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:42:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:42:04,821 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:06,198 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-05-02 23:42:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:42:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-02 23:42:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:06,199 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:42:06,199 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:42:06,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1155.7ms TimeCoverageRelationStatistics Valid=217, Invalid=2975, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:42:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:42:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 23:42:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-02 23:42:06,206 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2021-05-02 23:42:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:06,207 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-02 23:42:06,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-02 23:42:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:42:06,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:06,208 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:06,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:42:06,208 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:06,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1225008072, now seen corresponding path program 26 times [2021-05-02 23:42:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:06,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901448728] [2021-05-02 23:42:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:06,215 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_457 50) (< v_main_~x~0_457 99)) InVars {main_~x~0=v_main_~x~0_457} OutVars{main_~x~0=v_main_~x~0_457} AuxVars[] AssignedVars[] [2021-05-02 23:42:06,217 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:06,228 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:06,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:06,244 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:06,255 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:06,258 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_459 50) InVars {main_~x~0=v_main_~x~0_459} OutVars{main_~x~0=v_main_~x~0_459} AuxVars[] AssignedVars[] [2021-05-02 23:42:06,259 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:06,266 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:06,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:06,279 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:06,289 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:06,834 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:06,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901448728] [2021-05-02 23:42:06,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901448728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:06,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:06,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:42:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192167138] [2021-05-02 23:42:06,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:42:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:42:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:42:06,836 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:08,391 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-05-02 23:42:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:42:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 23:42:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:08,393 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:42:08,393 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:42:08,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1261.7ms TimeCoverageRelationStatistics Valid=225, Invalid=3197, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:42:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:42:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 23:42:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-02 23:42:08,402 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 63 [2021-05-02 23:42:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:08,402 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-02 23:42:08,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-02 23:42:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:42:08,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:08,404 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:08,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:42:08,404 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1424132069, now seen corresponding path program 27 times [2021-05-02 23:42:08,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:08,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558728464] [2021-05-02 23:42:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:08,414 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_488 50) (< v_main_~x~0_488 99)) InVars {main_~x~0=v_main_~x~0_488} OutVars{main_~x~0=v_main_~x~0_488} AuxVars[] AssignedVars[] [2021-05-02 23:42:08,417 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:08,431 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:08,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:08,451 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:08,462 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:08,465 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_490 50) InVars {main_~x~0=v_main_~x~0_490} OutVars{main_~x~0=v_main_~x~0_490} AuxVars[] AssignedVars[] [2021-05-02 23:42:08,467 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:08,476 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:08,483 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:08,492 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:08,506 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:08,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:08,568 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 23:42:09,107 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:09,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558728464] [2021-05-02 23:42:09,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558728464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:09,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:09,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:42:09,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79162049] [2021-05-02 23:42:09,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:42:09,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:09,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:42:09,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:42:09,109 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:10,879 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-05-02 23:42:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:42:10,880 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 23:42:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:10,881 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:42:10,881 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:42:10,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1431.0ms TimeCoverageRelationStatistics Valid=233, Invalid=3427, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:42:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:42:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 23:42:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 23:42:10,891 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2021-05-02 23:42:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:10,892 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 23:42:10,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 23:42:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:42:10,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:10,893 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:10,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:42:10,893 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash -491235134, now seen corresponding path program 28 times [2021-05-02 23:42:10,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:10,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521532750] [2021-05-02 23:42:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:10,901 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_520 99) (< v_main_~x~0_520 50)) InVars {main_~x~0=v_main_~x~0_520} OutVars{main_~x~0=v_main_~x~0_520} AuxVars[] AssignedVars[] [2021-05-02 23:42:10,903 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:10,905 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:10,912 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:10,929 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:10,940 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:10,943 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_522 50) InVars {main_~x~0=v_main_~x~0_522} OutVars{main_~x~0=v_main_~x~0_522} AuxVars[] AssignedVars[] [2021-05-02 23:42:10,945 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:10,953 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:10,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:10,972 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:10,984 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:11,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:11,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:11,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521532750] [2021-05-02 23:42:11,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521532750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:11,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:11,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:42:11,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054818808] [2021-05-02 23:42:11,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:42:11,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:11,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:42:11,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:42:11,552 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:13,137 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-05-02 23:42:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:42:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-02 23:42:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:13,138 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:42:13,138 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 23:42:13,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1292.7ms TimeCoverageRelationStatistics Valid=241, Invalid=3665, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:42:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 23:42:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 23:42:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-02 23:42:13,145 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2021-05-02 23:42:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:13,145 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-02 23:42:13,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-02 23:42:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:42:13,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:13,146 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:13,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:42:13,147 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1381852767, now seen corresponding path program 29 times [2021-05-02 23:42:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:13,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648138668] [2021-05-02 23:42:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:13,152 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_553 50) (< v_main_~x~0_553 99)) InVars {main_~x~0=v_main_~x~0_553} OutVars{main_~x~0=v_main_~x~0_553} AuxVars[] AssignedVars[] [2021-05-02 23:42:13,154 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:13,155 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:13,160 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:13,173 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:13,182 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:13,185 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_555 50) InVars {main_~x~0=v_main_~x~0_555} OutVars{main_~x~0=v_main_~x~0_555} AuxVars[] AssignedVars[] [2021-05-02 23:42:13,187 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:13,195 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:13,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:13,211 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:13,222 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:13,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:13,882 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:13,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648138668] [2021-05-02 23:42:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648138668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:13,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:13,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:42:13,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167425883] [2021-05-02 23:42:13,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:42:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:42:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:42:13,884 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:15,560 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-05-02 23:42:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:42:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 23:42:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:15,561 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:42:15,561 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:42:15,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1423.2ms TimeCoverageRelationStatistics Valid=249, Invalid=3911, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:42:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:42:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 23:42:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-05-02 23:42:15,570 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2021-05-02 23:42:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:15,570 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-05-02 23:42:15,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-05-02 23:42:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:42:15,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:15,571 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:15,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:42:15,571 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1828028604, now seen corresponding path program 30 times [2021-05-02 23:42:15,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:15,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089791678] [2021-05-02 23:42:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:15,578 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_587 99) (< v_main_~x~0_587 50)) InVars {main_~x~0=v_main_~x~0_587} OutVars{main_~x~0=v_main_~x~0_587} AuxVars[] AssignedVars[] [2021-05-02 23:42:15,581 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:15,588 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:15,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:15,603 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:15,614 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:15,617 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_589 50) InVars {main_~x~0=v_main_~x~0_589} OutVars{main_~x~0=v_main_~x~0_589} AuxVars[] AssignedVars[] [2021-05-02 23:42:15,619 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:15,622 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:15,629 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:15,643 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:15,654 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:16,297 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089791678] [2021-05-02 23:42:16,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089791678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:16,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:16,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:42:16,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141172498] [2021-05-02 23:42:16,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:42:16,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:16,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:42:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:42:16,300 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:18,045 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-05-02 23:42:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:42:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 23:42:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:18,047 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:42:18,047 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:42:18,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1452.2ms TimeCoverageRelationStatistics Valid=257, Invalid=4165, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:42:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:42:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 23:42:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-02 23:42:18,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2021-05-02 23:42:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:18,056 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-02 23:42:18,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-02 23:42:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:42:18,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:18,057 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:18,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:42:18,058 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1106278361, now seen corresponding path program 31 times [2021-05-02 23:42:18,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:18,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264470615] [2021-05-02 23:42:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:18,064 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_622 50) (< v_main_~x~0_622 99)) InVars {main_~x~0=v_main_~x~0_622} OutVars{main_~x~0=v_main_~x~0_622} AuxVars[] AssignedVars[] [2021-05-02 23:42:18,066 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:18,067 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:18,072 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:18,085 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:18,095 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:18,097 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_624 50) InVars {main_~x~0=v_main_~x~0_624} OutVars{main_~x~0=v_main_~x~0_624} AuxVars[] AssignedVars[] [2021-05-02 23:42:18,099 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:18,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:18,111 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:18,118 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:18,127 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:18,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:18,827 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264470615] [2021-05-02 23:42:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [264470615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:18,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:42:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509533230] [2021-05-02 23:42:18,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:42:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:42:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:42:18,829 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:20,811 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-05-02 23:42:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:42:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 23:42:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:20,812 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:42:20,812 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:42:20,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1606.4ms TimeCoverageRelationStatistics Valid=265, Invalid=4427, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:42:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:42:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 23:42:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 23:42:20,818 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2021-05-02 23:42:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:20,818 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 23:42:20,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 23:42:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:42:20,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:20,819 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:20,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:42:20,819 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1005970506, now seen corresponding path program 32 times [2021-05-02 23:42:20,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:20,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427976399] [2021-05-02 23:42:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:20,824 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_658 99) (< v_main_~x~0_658 50)) InVars {main_~x~0=v_main_~x~0_658} OutVars{main_~x~0=v_main_~x~0_658} AuxVars[] AssignedVars[] [2021-05-02 23:42:20,831 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:20,833 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,838 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:20,850 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:20,859 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:20,869 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_660 50) InVars {main_~x~0=v_main_~x~0_660} OutVars{main_~x~0=v_main_~x~0_660} AuxVars[] AssignedVars[] [2021-05-02 23:42:20,871 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:20,879 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,884 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:20,891 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:20,901 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:20,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:21,578 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427976399] [2021-05-02 23:42:21,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427976399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:21,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:21,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:42:21,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459862513] [2021-05-02 23:42:21,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:42:21,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:21,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:42:21,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:42:21,580 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:23,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:23,453 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-05-02 23:42:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:42:23,453 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:42:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:23,454 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:42:23,454 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:42:23,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1547.2ms TimeCoverageRelationStatistics Valid=273, Invalid=4697, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:42:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:42:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 23:42:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-02 23:42:23,463 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2021-05-02 23:42:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:23,464 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-02 23:42:23,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-02 23:42:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:42:23,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:23,465 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:23,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:42:23,465 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 642399315, now seen corresponding path program 33 times [2021-05-02 23:42:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:23,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248435827] [2021-05-02 23:42:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:23,474 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_695 50) (< v_main_~x~0_695 99)) InVars {main_~x~0=v_main_~x~0_695} OutVars{main_~x~0=v_main_~x~0_695} AuxVars[] AssignedVars[] [2021-05-02 23:42:23,478 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:23,480 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:23,488 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:23,510 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:23,520 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:23,523 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_697 50) InVars {main_~x~0=v_main_~x~0_697} OutVars{main_~x~0=v_main_~x~0_697} AuxVars[] AssignedVars[] [2021-05-02 23:42:23,526 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:23,527 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:23,537 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:23,552 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:23,561 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:23,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:24,263 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248435827] [2021-05-02 23:42:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [248435827] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:24,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:24,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:42:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179801858] [2021-05-02 23:42:24,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:42:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:42:24,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:42:24,266 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:26,325 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-05-02 23:42:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:42:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 23:42:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:26,326 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:42:26,326 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:42:26,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1675.6ms TimeCoverageRelationStatistics Valid=281, Invalid=4975, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:42:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:42:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 23:42:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-02 23:42:26,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2021-05-02 23:42:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:26,331 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-02 23:42:26,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-02 23:42:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:42:26,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:26,332 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:26,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:42:26,332 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash -117134928, now seen corresponding path program 34 times [2021-05-02 23:42:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142007145] [2021-05-02 23:42:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:26,336 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_733 50) (< v_main_~x~0_733 99)) InVars {main_~x~0=v_main_~x~0_733} OutVars{main_~x~0=v_main_~x~0_733} AuxVars[] AssignedVars[] [2021-05-02 23:42:26,338 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:26,359 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:26,364 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:26,371 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:26,381 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:26,382 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_735 50) InVars {main_~x~0=v_main_~x~0_735} OutVars{main_~x~0=v_main_~x~0_735} AuxVars[] AssignedVars[] [2021-05-02 23:42:26,384 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:26,384 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:26,389 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:26,403 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:26,412 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,449 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 23:42:27,210 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142007145] [2021-05-02 23:42:27,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142007145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:27,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:27,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:42:27,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099963947] [2021-05-02 23:42:27,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:42:27,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:42:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:42:27,213 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:29,540 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-05-02 23:42:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:42:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 23:42:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:29,542 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:42:29,542 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 23:42:29,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1885.8ms TimeCoverageRelationStatistics Valid=289, Invalid=5261, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:42:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 23:42:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 23:42:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-02 23:42:29,551 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 79 [2021-05-02 23:42:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:29,551 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-02 23:42:29,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-02 23:42:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:42:29,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:29,552 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:29,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:42:29,552 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 114897869, now seen corresponding path program 35 times [2021-05-02 23:42:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:29,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563880205] [2021-05-02 23:42:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:29,557 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_772 50) (< v_main_~x~0_772 99)) InVars {main_~x~0=v_main_~x~0_772} OutVars{main_~x~0=v_main_~x~0_772} AuxVars[] AssignedVars[] [2021-05-02 23:42:29,559 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:29,560 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:29,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:29,578 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:29,589 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:29,592 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_774 50) InVars {main_~x~0=v_main_~x~0_774} OutVars{main_~x~0=v_main_~x~0_774} AuxVars[] AssignedVars[] [2021-05-02 23:42:29,593 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:29,601 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:29,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:29,613 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:29,623 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:29,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:29,671 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 23:42:30,484 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:30,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563880205] [2021-05-02 23:42:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563880205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:42:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111233990] [2021-05-02 23:42:30,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:42:30,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:42:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:42:30,486 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:32,756 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-05-02 23:42:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:42:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 23:42:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:32,758 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:42:32,758 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:42:32,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1909.9ms TimeCoverageRelationStatistics Valid=297, Invalid=5555, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:42:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:42:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 23:42:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 23:42:32,765 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2021-05-02 23:42:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:32,765 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 23:42:32,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 23:42:32,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:42:32,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:32,766 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:32,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:42:32,766 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash -239883606, now seen corresponding path program 36 times [2021-05-02 23:42:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:32,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926973399] [2021-05-02 23:42:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:32,776 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_812 99) (< v_main_~x~0_812 50)) InVars {main_~x~0=v_main_~x~0_812} OutVars{main_~x~0=v_main_~x~0_812} AuxVars[] AssignedVars[] [2021-05-02 23:42:32,778 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:32,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:32,784 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:32,798 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:32,810 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:32,812 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_814 50) InVars {main_~x~0=v_main_~x~0_814} OutVars{main_~x~0=v_main_~x~0_814} AuxVars[] AssignedVars[] [2021-05-02 23:42:32,814 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:32,826 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:32,833 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:32,842 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:32,854 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:33,741 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:33,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926973399] [2021-05-02 23:42:33,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926973399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:33,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:33,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:42:33,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678693998] [2021-05-02 23:42:33,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:42:33,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:42:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:42:33,744 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:36,155 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-05-02 23:42:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:42:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:42:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:36,156 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:42:36,157 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:42:36,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2018.1ms TimeCoverageRelationStatistics Valid=305, Invalid=5857, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:42:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:42:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 23:42:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-05-02 23:42:36,164 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2021-05-02 23:42:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:36,165 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-05-02 23:42:36,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-05-02 23:42:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:42:36,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:36,166 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:36,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:42:36,166 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1882464697, now seen corresponding path program 37 times [2021-05-02 23:42:36,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:36,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939241036] [2021-05-02 23:42:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:36,171 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_853 50) (< v_main_~x~0_853 99)) InVars {main_~x~0=v_main_~x~0_853} OutVars{main_~x~0=v_main_~x~0_853} AuxVars[] AssignedVars[] [2021-05-02 23:42:36,173 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:36,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:36,178 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:36,190 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:36,200 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:36,201 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_855 50) InVars {main_~x~0=v_main_~x~0_855} OutVars{main_~x~0=v_main_~x~0_855} AuxVars[] AssignedVars[] [2021-05-02 23:42:36,203 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:36,204 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:36,210 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:36,222 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:36,231 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:36,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:37,096 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:37,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939241036] [2021-05-02 23:42:37,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939241036] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:37,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:37,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:42:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863289223] [2021-05-02 23:42:37,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:42:37,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:42:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:42:37,099 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:39,449 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-05-02 23:42:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:42:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 23:42:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:39,450 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:42:39,450 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:42:39,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1973.0ms TimeCoverageRelationStatistics Valid=313, Invalid=6167, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:42:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:42:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 23:42:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-05-02 23:42:39,458 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2021-05-02 23:42:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:39,458 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-05-02 23:42:39,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-05-02 23:42:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:42:39,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:39,459 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:39,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:42:39,460 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash 145071780, now seen corresponding path program 38 times [2021-05-02 23:42:39,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:39,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552481908] [2021-05-02 23:42:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:39,464 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_895 99) (< v_main_~x~0_895 50)) InVars {main_~x~0=v_main_~x~0_895} OutVars{main_~x~0=v_main_~x~0_895} AuxVars[] AssignedVars[] [2021-05-02 23:42:39,467 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:39,467 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:39,472 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:39,483 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:39,492 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:39,494 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_897 50) InVars {main_~x~0=v_main_~x~0_897} OutVars{main_~x~0=v_main_~x~0_897} AuxVars[] AssignedVars[] [2021-05-02 23:42:39,496 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:39,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:39,501 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:39,511 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:39,520 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:39,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:40,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:40,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552481908] [2021-05-02 23:42:40,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552481908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:40,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:40,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:42:40,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028913696] [2021-05-02 23:42:40,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:42:40,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:40,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:42:40,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:42:40,477 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:42,902 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-05-02 23:42:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:42:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 23:42:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:42,904 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:42:42,904 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 23:42:42,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2060.3ms TimeCoverageRelationStatistics Valid=321, Invalid=6485, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:42:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 23:42:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-02 23:42:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-02 23:42:42,913 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 87 [2021-05-02 23:42:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:42,913 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-02 23:42:42,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-02 23:42:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:42:42,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:42,914 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:42,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:42:42,914 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1307526207, now seen corresponding path program 39 times [2021-05-02 23:42:42,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:42,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87418150] [2021-05-02 23:42:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:42,921 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_938 99) (< v_main_~x~0_938 50)) InVars {main_~x~0=v_main_~x~0_938} OutVars{main_~x~0=v_main_~x~0_938} AuxVars[] AssignedVars[] [2021-05-02 23:42:42,923 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:42,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:42,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:42,940 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:42,949 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:42,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_940 50) InVars {main_~x~0=v_main_~x~0_940} OutVars{main_~x~0=v_main_~x~0_940} AuxVars[] AssignedVars[] [2021-05-02 23:42:42,951 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:42,957 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:42,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:42,966 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:42,976 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:43,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:43,905 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:43,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87418150] [2021-05-02 23:42:43,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [87418150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:43,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:43,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:42:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588669573] [2021-05-02 23:42:43,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:42:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:42:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:42:43,907 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:46,548 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-05-02 23:42:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:42:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 23:42:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:46,549 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:42:46,549 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:42:46,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2139.0ms TimeCoverageRelationStatistics Valid=329, Invalid=6811, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:42:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:42:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 23:42:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 23:42:46,558 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2021-05-02 23:42:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:46,558 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 23:42:46,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 23:42:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:42:46,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:46,559 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:46,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:42:46,560 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1389820514, now seen corresponding path program 40 times [2021-05-02 23:42:46,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:46,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340859445] [2021-05-02 23:42:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:46,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_982 50) (< v_main_~x~0_982 99)) InVars {main_~x~0=v_main_~x~0_982} OutVars{main_~x~0=v_main_~x~0_982} AuxVars[] AssignedVars[] [2021-05-02 23:42:46,567 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:46,573 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:46,578 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:46,585 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:46,594 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:46,595 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_984 50) InVars {main_~x~0=v_main_~x~0_984} OutVars{main_~x~0=v_main_~x~0_984} AuxVars[] AssignedVars[] [2021-05-02 23:42:46,596 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:46,602 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:46,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:46,613 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:46,622 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:46,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:47,582 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340859445] [2021-05-02 23:42:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [340859445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:47,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:47,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:42:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490065625] [2021-05-02 23:42:47,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:42:47,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:42:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:42:47,584 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:50,402 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-05-02 23:42:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:42:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 23:42:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:50,404 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:42:50,404 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 23:42:50,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2283.6ms TimeCoverageRelationStatistics Valid=337, Invalid=7145, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:42:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 23:42:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 23:42:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-02 23:42:50,415 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 91 [2021-05-02 23:42:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:50,415 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-02 23:42:50,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-02 23:42:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:42:50,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:50,416 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:50,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:42:50,416 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1129729083, now seen corresponding path program 41 times [2021-05-02 23:42:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:50,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453941865] [2021-05-02 23:42:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:50,423 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1027 50) (< v_main_~x~0_1027 99)) InVars {main_~x~0=v_main_~x~0_1027} OutVars{main_~x~0=v_main_~x~0_1027} AuxVars[] AssignedVars[] [2021-05-02 23:42:50,425 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:50,426 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:50,432 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:50,461 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:50,472 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:50,475 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1029 50) InVars {main_~x~0=v_main_~x~0_1029} OutVars{main_~x~0=v_main_~x~0_1029} AuxVars[] AssignedVars[] [2021-05-02 23:42:50,483 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:50,485 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:50,493 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:50,510 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:50,525 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:51,709 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453941865] [2021-05-02 23:42:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453941865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:51,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:51,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:42:51,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554424193] [2021-05-02 23:42:51,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:42:51,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:42:51,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:42:51,711 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:54,659 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-05-02 23:42:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:42:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:42:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:54,661 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:42:54,661 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:42:54,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2486.1ms TimeCoverageRelationStatistics Valid=345, Invalid=7487, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:42:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:42:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-02 23:42:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-05-02 23:42:54,668 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2021-05-02 23:42:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:54,668 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-05-02 23:42:54,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-05-02 23:42:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:42:54,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:54,669 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:54,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:42:54,670 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash 55336856, now seen corresponding path program 42 times [2021-05-02 23:42:54,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:54,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468718429] [2021-05-02 23:42:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:54,676 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1073 99) (< v_main_~x~0_1073 50)) InVars {main_~x~0=v_main_~x~0_1073} OutVars{main_~x~0=v_main_~x~0_1073} AuxVars[] AssignedVars[] [2021-05-02 23:42:54,678 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:54,679 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:54,684 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:54,694 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:54,704 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:54,706 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1075 50) InVars {main_~x~0=v_main_~x~0_1075} OutVars{main_~x~0=v_main_~x~0_1075} AuxVars[] AssignedVars[] [2021-05-02 23:42:54,707 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:54,707 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:54,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:54,724 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:54,734 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:54,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:55,934 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:55,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468718429] [2021-05-02 23:42:55,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [468718429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:55,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:55,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:42:55,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182870885] [2021-05-02 23:42:55,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:42:55,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:55,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:42:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:42:55,936 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:58,883 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-05-02 23:42:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:42:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:42:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:58,884 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:42:58,884 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 23:42:58,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2544.0ms TimeCoverageRelationStatistics Valid=353, Invalid=7837, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:42:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 23:42:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 23:42:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-05-02 23:42:58,894 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2021-05-02 23:42:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:58,894 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-05-02 23:42:58,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-05-02 23:42:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:42:58,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:58,895 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:58,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:42:58,895 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:58,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1643442251, now seen corresponding path program 43 times [2021-05-02 23:42:58,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:58,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283036668] [2021-05-02 23:42:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:58,901 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1120 99) (< v_main_~x~0_1120 50)) InVars {main_~x~0=v_main_~x~0_1120} OutVars{main_~x~0=v_main_~x~0_1120} AuxVars[] AssignedVars[] [2021-05-02 23:42:58,903 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:58,909 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:58,914 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:58,919 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:58,928 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:58,930 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1122 50) InVars {main_~x~0=v_main_~x~0_1122} OutVars{main_~x~0=v_main_~x~0_1122} AuxVars[] AssignedVars[] [2021-05-02 23:42:58,931 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:58,937 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:58,941 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:58,947 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:58,956 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:58,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:00,016 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283036668] [2021-05-02 23:43:00,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283036668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:00,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:00,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:43:00,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891193830] [2021-05-02 23:43:00,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:43:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:43:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:43:00,018 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:03,181 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-05-02 23:43:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:43:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-02 23:43:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:03,182 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:43:03,182 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:43:03,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2518.7ms TimeCoverageRelationStatistics Valid=361, Invalid=8195, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:43:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:43:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 23:43:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 23:43:03,189 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2021-05-02 23:43:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:03,190 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 23:43:03,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 23:43:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:43:03,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:03,191 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:03,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:43:03,191 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:03,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2082591598, now seen corresponding path program 44 times [2021-05-02 23:43:03,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:03,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396344973] [2021-05-02 23:43:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:03,210 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1168 99) (< v_main_~x~0_1168 50)) InVars {main_~x~0=v_main_~x~0_1168} OutVars{main_~x~0=v_main_~x~0_1168} AuxVars[] AssignedVars[] [2021-05-02 23:43:03,212 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:03,213 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:03,228 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:03,241 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:03,252 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:03,254 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1170 50) InVars {main_~x~0=v_main_~x~0_1170} OutVars{main_~x~0=v_main_~x~0_1170} AuxVars[] AssignedVars[] [2021-05-02 23:43:03,256 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:03,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:03,262 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:03,275 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:03,286 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:03,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:04,458 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:04,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396344973] [2021-05-02 23:43:04,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396344973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:04,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:04,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:43:04,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901087830] [2021-05-02 23:43:04,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:43:04,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:43:04,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:43:04,461 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:08,418 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-05-02 23:43:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:43:08,419 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:43:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:08,420 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:43:08,420 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:43:08,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 2986.4ms TimeCoverageRelationStatistics Valid=369, Invalid=8561, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:43:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:43:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 23:43:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-05-02 23:43:08,431 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2021-05-02 23:43:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:08,431 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-05-02 23:43:08,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-05-02 23:43:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:43:08,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:08,432 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:08,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:43:08,432 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1096648239, now seen corresponding path program 45 times [2021-05-02 23:43:08,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:08,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223892574] [2021-05-02 23:43:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:08,449 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1217 99) (< v_main_~x~0_1217 50)) InVars {main_~x~0=v_main_~x~0_1217} OutVars{main_~x~0=v_main_~x~0_1217} AuxVars[] AssignedVars[] [2021-05-02 23:43:08,451 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:08,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:08,467 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:08,477 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:08,490 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:08,492 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1219 50) InVars {main_~x~0=v_main_~x~0_1219} OutVars{main_~x~0=v_main_~x~0_1219} AuxVars[] AssignedVars[] [2021-05-02 23:43:08,494 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:08,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:08,510 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:08,520 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:08,533 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:08,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:08,580 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 23:43:09,920 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:09,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223892574] [2021-05-02 23:43:09,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223892574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:09,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:09,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:43:09,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856161427] [2021-05-02 23:43:09,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:43:09,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:09,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:43:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:43:09,922 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:13,497 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-05-02 23:43:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:43:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:43:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:13,499 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:43:13,499 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:43:13,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 2998.0ms TimeCoverageRelationStatistics Valid=377, Invalid=8935, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:43:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:43:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-02 23:43:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-05-02 23:43:13,510 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2021-05-02 23:43:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:13,510 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-05-02 23:43:13,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-05-02 23:43:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:43:13,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:13,511 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:13,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:43:13,512 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1670583156, now seen corresponding path program 46 times [2021-05-02 23:43:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748103003] [2021-05-02 23:43:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:13,520 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1267 50) (< v_main_~x~0_1267 99)) InVars {main_~x~0=v_main_~x~0_1267} OutVars{main_~x~0=v_main_~x~0_1267} AuxVars[] AssignedVars[] [2021-05-02 23:43:13,523 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:13,531 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:13,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:13,548 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:13,560 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:13,563 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1269 50) InVars {main_~x~0=v_main_~x~0_1269} OutVars{main_~x~0=v_main_~x~0_1269} AuxVars[] AssignedVars[] [2021-05-02 23:43:13,570 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:13,579 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:13,586 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:13,595 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:13,607 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:13,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:15,066 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:15,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748103003] [2021-05-02 23:43:15,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [748103003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:15,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:15,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:43:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424735726] [2021-05-02 23:43:15,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:43:15,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:43:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:43:15,068 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:18,788 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-05-02 23:43:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:43:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:43:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:18,793 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:43:18,793 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:43:18,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 3137.5ms TimeCoverageRelationStatistics Valid=385, Invalid=9317, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:43:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:43:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-02 23:43:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-05-02 23:43:18,804 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 103 [2021-05-02 23:43:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:18,805 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-05-02 23:43:18,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-05-02 23:43:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:43:18,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:18,806 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:18,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:43:18,806 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1899769769, now seen corresponding path program 47 times [2021-05-02 23:43:18,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:18,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436676222] [2021-05-02 23:43:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:18,814 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1318 99) (< v_main_~x~0_1318 50)) InVars {main_~x~0=v_main_~x~0_1318} OutVars{main_~x~0=v_main_~x~0_1318} AuxVars[] AssignedVars[] [2021-05-02 23:43:18,817 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:18,819 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:18,826 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:18,845 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:18,858 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:18,861 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1320 50) InVars {main_~x~0=v_main_~x~0_1320} OutVars{main_~x~0=v_main_~x~0_1320} AuxVars[] AssignedVars[] [2021-05-02 23:43:18,863 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:18,865 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:18,872 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:18,896 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:18,908 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:20,392 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:20,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436676222] [2021-05-02 23:43:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436676222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:20,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:20,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:43:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459677118] [2021-05-02 23:43:20,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:43:20,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:43:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:43:20,394 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:24,022 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-05-02 23:43:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:43:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 23:43:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:24,024 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:43:24,024 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:43:24,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 3107.8ms TimeCoverageRelationStatistics Valid=393, Invalid=9707, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:43:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:43:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 23:43:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 23:43:24,033 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2021-05-02 23:43:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:24,033 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 23:43:24,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 23:43:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 23:43:24,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:24,034 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:24,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:43:24,034 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1330061190, now seen corresponding path program 48 times [2021-05-02 23:43:24,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:24,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297943440] [2021-05-02 23:43:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:24,040 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1370 99) (< v_main_~x~0_1370 50)) InVars {main_~x~0=v_main_~x~0_1370} OutVars{main_~x~0=v_main_~x~0_1370} AuxVars[] AssignedVars[] [2021-05-02 23:43:24,042 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:24,048 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:24,053 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:24,060 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:24,071 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:24,072 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1372 50) InVars {main_~x~0=v_main_~x~0_1372} OutVars{main_~x~0=v_main_~x~0_1372} AuxVars[] AssignedVars[] [2021-05-02 23:43:24,074 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:24,080 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:24,085 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:24,092 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:24,102 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:25,497 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:25,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297943440] [2021-05-02 23:43:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [297943440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:43:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801464085] [2021-05-02 23:43:25,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:43:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:25,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:43:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:43:25,499 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:30,328 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-05-02 23:43:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:43:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 23:43:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:30,330 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:43:30,330 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:43:30,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 3658.5ms TimeCoverageRelationStatistics Valid=401, Invalid=10105, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:43:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:43:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 23:43:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-05-02 23:43:30,340 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2021-05-02 23:43:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:30,340 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-05-02 23:43:30,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-05-02 23:43:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 23:43:30,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:30,341 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:30,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:43:30,342 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash -699036637, now seen corresponding path program 49 times [2021-05-02 23:43:30,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:30,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100997383] [2021-05-02 23:43:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:30,350 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1423 99) (< v_main_~x~0_1423 50)) InVars {main_~x~0=v_main_~x~0_1423} OutVars{main_~x~0=v_main_~x~0_1423} AuxVars[] AssignedVars[] [2021-05-02 23:43:30,358 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:30,360 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:30,367 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:30,386 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:30,400 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:30,403 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1425 50) InVars {main_~x~0=v_main_~x~0_1425} OutVars{main_~x~0=v_main_~x~0_1425} AuxVars[] AssignedVars[] [2021-05-02 23:43:30,405 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:30,407 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:30,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:30,430 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:30,445 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:32,252 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100997383] [2021-05-02 23:43:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100997383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:32,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:32,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:43:32,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465600948] [2021-05-02 23:43:32,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:43:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:43:32,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:43:32,254 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:36,864 INFO L93 Difference]: Finished difference Result 218 states and 320 transitions. [2021-05-02 23:43:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:43:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 23:43:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:36,867 INFO L225 Difference]: With dead ends: 218 [2021-05-02 23:43:36,867 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 23:43:36,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3780.3ms TimeCoverageRelationStatistics Valid=409, Invalid=10511, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:43:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 23:43:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 115. [2021-05-02 23:43:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2021-05-02 23:43:36,877 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2021-05-02 23:43:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:36,877 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2021-05-02 23:43:36,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2021-05-02 23:43:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:43:36,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:36,881 INFO L523 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:36,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:43:36,881 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 562154715, now seen corresponding path program 1 times [2021-05-02 23:43:36,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:36,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224081227] [2021-05-02 23:43:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:36,893 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1477 50) (< v_main_~x~0_1477 99)) InVars {main_~x~0=v_main_~x~0_1477} OutVars{main_~x~0=v_main_~x~0_1477} AuxVars[] AssignedVars[] [2021-05-02 23:43:36,896 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:36,897 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:36,905 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:36,922 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:36,934 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:36,936 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1479 50) InVars {main_~x~0=v_main_~x~0_1479} OutVars{main_~x~0=v_main_~x~0_1479} AuxVars[] AssignedVars[] [2021-05-02 23:43:36,939 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:36,940 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:36,945 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:36,960 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:36,980 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1481) (< v_main_~x~0_1481 100)) InVars {main_~x~0=v_main_~x~0_1481} OutVars{main_~x~0=v_main_~x~0_1481} AuxVars[] AssignedVars[] [2021-05-02 23:43:36,983 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:36,985 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:37,005 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:37,024 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:37,029 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:37,074 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:37,097 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:37,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:39,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224081227] [2021-05-02 23:43:39,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224081227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:39,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:39,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:43:39,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635797297] [2021-05-02 23:43:39,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:43:39,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:43:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3432, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:43:39,645 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 56 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:45,522 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2021-05-02 23:43:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:43:45,523 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 56 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2021-05-02 23:43:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:45,524 INFO L225 Difference]: With dead ends: 224 [2021-05-02 23:43:45,524 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:43:45,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 5289.9ms TimeCoverageRelationStatistics Valid=541, Invalid=12115, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:43:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:43:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 23:43:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 23:43:45,539 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2021-05-02 23:43:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:45,539 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 23:43:45,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 56 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 23:43:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 23:43:45,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:45,549 INFO L523 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:45,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:43:45,549 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:45,550 INFO L82 PathProgramCache]: Analyzing trace with hash 134474102, now seen corresponding path program 2 times [2021-05-02 23:43:45,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:45,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67705656] [2021-05-02 23:43:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:45,563 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1536) (< v_main_~x~0_1536 99)) InVars {main_~x~0=v_main_~x~0_1536} OutVars{main_~x~0=v_main_~x~0_1536} AuxVars[] AssignedVars[] [2021-05-02 23:43:45,567 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:45,569 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:45,573 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:45,592 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:45,596 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:45,642 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:45,674 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1538 99) (< v_main_~x~0_1538 50)) InVars {main_~x~0=v_main_~x~0_1538} OutVars{main_~x~0=v_main_~x~0_1538} AuxVars[] AssignedVars[] [2021-05-02 23:43:45,680 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:45,682 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:45,688 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:45,706 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:45,721 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:45,724 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1540 50) InVars {main_~x~0=v_main_~x~0_1540} OutVars{main_~x~0=v_main_~x~0_1540} AuxVars[] AssignedVars[] [2021-05-02 23:43:45,731 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:45,741 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:45,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:45,776 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:45,793 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1542 100) (<= 50 v_main_~x~0_1542)) InVars {main_~x~0=v_main_~x~0_1542} OutVars{main_~x~0=v_main_~x~0_1542} AuxVars[] AssignedVars[] [2021-05-02 23:43:45,795 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:45,812 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:45,815 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:45,840 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:45,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:45,861 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:45,886 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:46,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:46,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:48,466 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:48,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67705656] [2021-05-02 23:43:48,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [67705656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:48,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:48,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:43:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918241148] [2021-05-02 23:43:48,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:43:48,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:43:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3600, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:43:48,468 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 59 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 57 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:54,155 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-05-02 23:43:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:43:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 57 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 23:43:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:54,158 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:43:54,158 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:43:54,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 5112.4ms TimeCoverageRelationStatistics Valid=451, Invalid=12659, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:43:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:43:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 23:43:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-05-02 23:43:54,176 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 115 [2021-05-02 23:43:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:54,176 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-05-02 23:43:54,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 57 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-05-02 23:43:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 23:43:54,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:54,178 INFO L523 BasicCegarLoop]: trace histogram [53, 50, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:54,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:43:54,178 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1450265425, now seen corresponding path program 3 times [2021-05-02 23:43:54,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:54,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17495695] [2021-05-02 23:43:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:54,197 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1598 99) (<= 50 v_main_~x~0_1598)) InVars {main_~x~0=v_main_~x~0_1598} OutVars{main_~x~0=v_main_~x~0_1598} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,202 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:54,229 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,234 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,260 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:54,264 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:54,293 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:54,319 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1600 99) (< v_main_~x~0_1600 50)) InVars {main_~x~0=v_main_~x~0_1600} OutVars{main_~x~0=v_main_~x~0_1600} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,322 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:54,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:54,360 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:54,374 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:54,378 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1602 50) InVars {main_~x~0=v_main_~x~0_1602} OutVars{main_~x~0=v_main_~x~0_1602} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,381 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:54,402 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,410 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:54,419 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:54,438 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1604) (< v_main_~x~0_1604 100)) InVars {main_~x~0=v_main_~x~0_1604} OutVars{main_~x~0=v_main_~x~0_1604} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,442 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:54,466 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,470 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:54,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:54,531 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:54,559 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:54,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:57,128 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17495695] [2021-05-02 23:43:57,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [17495695] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:57,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:57,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:43:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317464489] [2021-05-02 23:43:57,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:43:57,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:57,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:43:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=3672, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:43:57,131 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 58 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:03,769 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-05-02 23:44:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:44:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 58 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 23:44:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:03,771 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:44:03,771 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:44:03,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 5637.6ms TimeCoverageRelationStatistics Valid=557, Invalid=13015, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:44:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:44:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-05-02 23:44:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-05-02 23:44:03,786 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2021-05-02 23:44:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:03,786 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-05-02 23:44:03,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 58 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-05-02 23:44:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 23:44:03,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:03,787 INFO L523 BasicCegarLoop]: trace histogram [54, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:03,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:44:03,787 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1089625492, now seen corresponding path program 4 times [2021-05-02 23:44:03,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:03,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295388038] [2021-05-02 23:44:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:03,802 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1661) (< v_main_~x~0_1661 99)) InVars {main_~x~0=v_main_~x~0_1661} OutVars{main_~x~0=v_main_~x~0_1661} AuxVars[] AssignedVars[] [2021-05-02 23:44:03,806 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:03,809 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:03,813 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:03,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:03,833 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:03,871 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:03,904 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1663 50) (< v_main_~x~0_1663 99)) InVars {main_~x~0=v_main_~x~0_1663} OutVars{main_~x~0=v_main_~x~0_1663} AuxVars[] AssignedVars[] [2021-05-02 23:44:03,907 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:03,919 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:03,928 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:03,941 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:03,956 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:03,960 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1665 50) InVars {main_~x~0=v_main_~x~0_1665} OutVars{main_~x~0=v_main_~x~0_1665} AuxVars[] AssignedVars[] [2021-05-02 23:44:03,962 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:03,972 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:03,986 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:03,997 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:04,016 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1667 100) (<= 50 v_main_~x~0_1667)) InVars {main_~x~0=v_main_~x~0_1667} OutVars{main_~x~0=v_main_~x~0_1667} AuxVars[] AssignedVars[] [2021-05-02 23:44:04,020 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:04,044 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:04,048 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:04,063 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:04,067 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:04,085 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:04,110 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:04,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:04,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,681 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295388038] [2021-05-02 23:44:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [295388038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:06,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:06,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:44:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009449580] [2021-05-02 23:44:06,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:44:06,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:44:06,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3844, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:44:06,684 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 61 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 59 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:12,292 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2021-05-02 23:44:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:44:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 59 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 23:44:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:12,293 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:44:12,293 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 23:44:12,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5182.5ms TimeCoverageRelationStatistics Valid=467, Invalid=13575, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:44:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 23:44:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 23:44:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-05-02 23:44:12,302 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 119 [2021-05-02 23:44:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:12,302 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-05-02 23:44:12,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 59 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-05-02 23:44:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 23:44:12,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:12,303 INFO L523 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:12,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:44:12,303 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1911594695, now seen corresponding path program 5 times [2021-05-02 23:44:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:12,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594067020] [2021-05-02 23:44:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:12,312 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1725 99) (<= 50 v_main_~x~0_1725)) InVars {main_~x~0=v_main_~x~0_1725} OutVars{main_~x~0=v_main_~x~0_1725} AuxVars[] AssignedVars[] [2021-05-02 23:44:12,314 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:12,315 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:12,317 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:12,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:12,336 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:12,364 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:12,385 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1727 50) (< v_main_~x~0_1727 99)) InVars {main_~x~0=v_main_~x~0_1727} OutVars{main_~x~0=v_main_~x~0_1727} AuxVars[] AssignedVars[] [2021-05-02 23:44:12,387 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:12,388 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:12,394 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:12,407 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:12,419 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:12,421 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1729 50) InVars {main_~x~0=v_main_~x~0_1729} OutVars{main_~x~0=v_main_~x~0_1729} AuxVars[] AssignedVars[] [2021-05-02 23:44:12,422 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:12,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:12,440 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:12,448 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:12,461 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1731) (< v_main_~x~0_1731 100)) InVars {main_~x~0=v_main_~x~0_1731} OutVars{main_~x~0=v_main_~x~0_1731} AuxVars[] AssignedVars[] [2021-05-02 23:44:12,471 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:12,485 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:12,492 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:12,508 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:12,511 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:12,527 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:12,546 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:12,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:12,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:15,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:15,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594067020] [2021-05-02 23:44:15,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [594067020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:15,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:15,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:44:15,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306781459] [2021-05-02 23:44:15,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:44:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:15,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:44:15,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3969, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:44:15,151 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 62 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 60 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:20,597 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-05-02 23:44:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:44:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 60 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-02 23:44:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:20,598 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:44:20,598 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 23:44:20,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 5075.0ms TimeCoverageRelationStatistics Valid=475, Invalid=14045, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:44:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 23:44:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 23:44:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 23:44:20,606 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2021-05-02 23:44:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:20,606 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 23:44:20,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 60 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 23:44:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 23:44:20,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:20,607 INFO L523 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:20,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:44:20,608 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash -133828510, now seen corresponding path program 6 times [2021-05-02 23:44:20,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:20,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537095983] [2021-05-02 23:44:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:20,624 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1790 99) (<= 50 v_main_~x~0_1790)) InVars {main_~x~0=v_main_~x~0_1790} OutVars{main_~x~0=v_main_~x~0_1790} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,626 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:20,638 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,641 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,650 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:20,652 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:20,667 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:20,688 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1792 99) (< v_main_~x~0_1792 50)) InVars {main_~x~0=v_main_~x~0_1792} OutVars{main_~x~0=v_main_~x~0_1792} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,689 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:20,695 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,700 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:20,706 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:20,729 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:20,731 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1794 50) InVars {main_~x~0=v_main_~x~0_1794} OutVars{main_~x~0=v_main_~x~0_1794} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,732 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:20,738 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,743 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:20,749 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:20,761 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1796) (< v_main_~x~0_1796 100)) InVars {main_~x~0=v_main_~x~0_1796} OutVars{main_~x~0=v_main_~x~0_1796} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,763 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:20,764 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,766 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,775 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:20,778 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:20,800 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:20,818 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:20,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:23,295 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:23,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537095983] [2021-05-02 23:44:23,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [537095983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:23,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:23,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:44:23,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335039877] [2021-05-02 23:44:23,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:44:23,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:23,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:44:23,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4096, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:44:23,297 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 63 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 61 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:29,194 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-05-02 23:44:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:44:29,195 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 61 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 23:44:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:29,196 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:44:29,196 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 23:44:29,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 5201.8ms TimeCoverageRelationStatistics Valid=483, Invalid=14523, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:44:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 23:44:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 23:44:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-05-02 23:44:29,206 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 123 [2021-05-02 23:44:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:29,207 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-05-02 23:44:29,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 61 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-05-02 23:44:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:44:29,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:29,208 INFO L523 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:29,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:44:29,208 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1309493053, now seen corresponding path program 7 times [2021-05-02 23:44:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:29,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655110112] [2021-05-02 23:44:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:29,220 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1856) (< v_main_~x~0_1856 99)) InVars {main_~x~0=v_main_~x~0_1856} OutVars{main_~x~0=v_main_~x~0_1856} AuxVars[] AssignedVars[] [2021-05-02 23:44:29,223 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:29,238 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:29,245 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:29,255 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:29,258 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:29,272 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:29,303 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1858 50) (< v_main_~x~0_1858 99)) InVars {main_~x~0=v_main_~x~0_1858} OutVars{main_~x~0=v_main_~x~0_1858} AuxVars[] AssignedVars[] [2021-05-02 23:44:29,316 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:29,327 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:29,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:29,341 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:29,352 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:29,354 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1860 50) InVars {main_~x~0=v_main_~x~0_1860} OutVars{main_~x~0=v_main_~x~0_1860} AuxVars[] AssignedVars[] [2021-05-02 23:44:29,355 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:29,373 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:29,394 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:29,403 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:29,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1862 100) (<= 50 v_main_~x~0_1862)) InVars {main_~x~0=v_main_~x~0_1862} OutVars{main_~x~0=v_main_~x~0_1862} AuxVars[] AssignedVars[] [2021-05-02 23:44:29,421 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:29,423 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:29,427 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:29,439 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:29,443 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:29,474 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:29,497 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:29,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:32,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655110112] [2021-05-02 23:44:32,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655110112] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:32,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:32,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:44:32,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028792474] [2021-05-02 23:44:32,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:44:32,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:44:32,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4225, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:44:32,524 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 64 states, 63 states have (on average 1.9206349206349207) internal successors, (121), 62 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:38,870 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2021-05-02 23:44:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:44:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.9206349206349207) internal successors, (121), 62 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 23:44:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:38,872 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:44:38,872 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:44:38,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 5947.4ms TimeCoverageRelationStatistics Valid=491, Invalid=15009, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:44:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:44:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-02 23:44:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-05-02 23:44:38,885 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2021-05-02 23:44:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:38,885 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-05-02 23:44:38,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.9206349206349207) internal successors, (121), 62 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-05-02 23:44:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 23:44:38,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:38,886 INFO L523 BasicCegarLoop]: trace histogram [58, 50, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:38,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:44:38,889 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1067078488, now seen corresponding path program 8 times [2021-05-02 23:44:38,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:38,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847297236] [2021-05-02 23:44:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:38,905 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1923) (< v_main_~x~0_1923 99)) InVars {main_~x~0=v_main_~x~0_1923} OutVars{main_~x~0=v_main_~x~0_1923} AuxVars[] AssignedVars[] [2021-05-02 23:44:38,908 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:38,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:38,924 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:38,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:38,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:38,951 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:38,970 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1925 50) (< v_main_~x~0_1925 99)) InVars {main_~x~0=v_main_~x~0_1925} OutVars{main_~x~0=v_main_~x~0_1925} AuxVars[] AssignedVars[] [2021-05-02 23:44:38,972 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:38,979 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:38,984 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:38,991 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:39,002 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:39,004 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1927 50) InVars {main_~x~0=v_main_~x~0_1927} OutVars{main_~x~0=v_main_~x~0_1927} AuxVars[] AssignedVars[] [2021-05-02 23:44:39,005 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:39,012 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:39,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:39,024 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:39,037 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1929) (< v_main_~x~0_1929 100)) InVars {main_~x~0=v_main_~x~0_1929} OutVars{main_~x~0=v_main_~x~0_1929} AuxVars[] AssignedVars[] [2021-05-02 23:44:39,043 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:39,044 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:39,047 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:39,058 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:39,060 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:39,085 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:39,105 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:39,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:39,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,921 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847297236] [2021-05-02 23:44:41,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [847297236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:41,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:41,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:44:41,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767801878] [2021-05-02 23:44:41,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:44:41,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:44:41,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4356, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:44:41,923 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 65 states, 64 states have (on average 1.921875) internal successors, (123), 63 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:48,648 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-05-02 23:44:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:44:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.921875) internal successors, (123), 63 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 23:44:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:48,650 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:44:48,650 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 23:44:48,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 51 SyntacticMatches, 11 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 5913.5ms TimeCoverageRelationStatistics Valid=499, Invalid=15503, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:44:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 23:44:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 23:44:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-05-02 23:44:48,659 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 127 [2021-05-02 23:44:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:48,660 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-05-02 23:44:48,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.921875) internal successors, (123), 63 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-05-02 23:44:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 23:44:48,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:48,660 INFO L523 BasicCegarLoop]: trace histogram [59, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:48,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:44:48,661 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 34915507, now seen corresponding path program 9 times [2021-05-02 23:44:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:48,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928616591] [2021-05-02 23:44:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:48,670 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1991) (< v_main_~x~0_1991 99)) InVars {main_~x~0=v_main_~x~0_1991} OutVars{main_~x~0=v_main_~x~0_1991} AuxVars[] AssignedVars[] [2021-05-02 23:44:48,672 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:48,674 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,677 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,688 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:48,691 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:48,717 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:48,738 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1993 50) (< v_main_~x~0_1993 99)) InVars {main_~x~0=v_main_~x~0_1993} OutVars{main_~x~0=v_main_~x~0_1993} AuxVars[] AssignedVars[] [2021-05-02 23:44:48,739 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:48,740 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,745 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:48,758 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:48,768 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:48,777 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1995 50) InVars {main_~x~0=v_main_~x~0_1995} OutVars{main_~x~0=v_main_~x~0_1995} AuxVars[] AssignedVars[] [2021-05-02 23:44:48,778 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:48,785 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,805 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:48,815 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:48,831 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_1997) (< v_main_~x~0_1997 100)) InVars {main_~x~0=v_main_~x~0_1997} OutVars{main_~x~0=v_main_~x~0_1997} AuxVars[] AssignedVars[] [2021-05-02 23:44:48,833 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:48,848 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,861 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,877 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:48,881 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:48,905 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:48,925 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:49,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:51,814 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:51,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928616591] [2021-05-02 23:44:51,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [928616591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:51,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:51,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:44:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476024840] [2021-05-02 23:44:51,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:44:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:44:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4489, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:44:51,816 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 64 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:00,063 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2021-05-02 23:45:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:45:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 64 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 23:45:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:00,066 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:45:00,066 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 23:45:00,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 6767.7ms TimeCoverageRelationStatistics Valid=507, Invalid=16005, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:45:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 23:45:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 23:45:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 23:45:00,075 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 129 [2021-05-02 23:45:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:00,075 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 23:45:00,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 64 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 23:45:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 23:45:00,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:00,077 INFO L523 BasicCegarLoop]: trace histogram [60, 50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:00,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:45:00,077 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 263736142, now seen corresponding path program 10 times [2021-05-02 23:45:00,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:00,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885266476] [2021-05-02 23:45:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:00,089 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2060) (< v_main_~x~0_2060 99)) InVars {main_~x~0=v_main_~x~0_2060} OutVars{main_~x~0=v_main_~x~0_2060} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,097 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:00,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,123 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,140 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:00,145 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:00,170 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:00,208 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2062 99) (< v_main_~x~0_2062 50)) InVars {main_~x~0=v_main_~x~0_2062} OutVars{main_~x~0=v_main_~x~0_2062} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,211 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:00,213 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:00,248 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:00,266 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:00,269 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2064 50) InVars {main_~x~0=v_main_~x~0_2064} OutVars{main_~x~0=v_main_~x~0_2064} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,272 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:00,273 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,282 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:00,305 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:00,327 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2066) (< v_main_~x~0_2066 100)) InVars {main_~x~0=v_main_~x~0_2066} OutVars{main_~x~0=v_main_~x~0_2066} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,330 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:00,353 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,357 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,373 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:00,378 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:00,403 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:00,436 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:00,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:00,580 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 23:45:00,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:03,992 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:03,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885266476] [2021-05-02 23:45:03,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885266476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:03,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:03,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:45:03,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642350946] [2021-05-02 23:45:03,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:45:03,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:03,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:45:03,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4624, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:45:03,994 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 65 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:11,312 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2021-05-02 23:45:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:45:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 65 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 23:45:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:11,313 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:45:11,313 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:45:11,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 6938.0ms TimeCoverageRelationStatistics Valid=515, Invalid=16515, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:45:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:45:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 23:45:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-05-02 23:45:11,324 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 131 [2021-05-02 23:45:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:11,324 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-05-02 23:45:11,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 65 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-05-02 23:45:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 23:45:11,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:11,325 INFO L523 BasicCegarLoop]: trace histogram [61, 50, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:11,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:45:11,326 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1117034281, now seen corresponding path program 11 times [2021-05-02 23:45:11,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:11,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039127046] [2021-05-02 23:45:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:11,333 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2130 99) (<= 50 v_main_~x~0_2130)) InVars {main_~x~0=v_main_~x~0_2130} OutVars{main_~x~0=v_main_~x~0_2130} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,334 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:11,335 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,337 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:11,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:11,372 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:11,390 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2132 99) (< v_main_~x~0_2132 50)) InVars {main_~x~0=v_main_~x~0_2132} OutVars{main_~x~0=v_main_~x~0_2132} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,391 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:11,396 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,400 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:11,408 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:11,418 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:11,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2134 50) InVars {main_~x~0=v_main_~x~0_2134} OutVars{main_~x~0=v_main_~x~0_2134} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,420 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:11,425 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,430 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:11,435 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:11,447 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2136 100) (<= 50 v_main_~x~0_2136)) InVars {main_~x~0=v_main_~x~0_2136} OutVars{main_~x~0=v_main_~x~0_2136} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,454 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:11,465 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,467 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,475 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:11,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:11,490 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:11,507 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:11,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,462 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:14,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039127046] [2021-05-02 23:45:14,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039127046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:14,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:14,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:45:14,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585996285] [2021-05-02 23:45:14,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:45:14,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:14,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:45:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4761, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:45:14,464 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 68 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 66 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:21,921 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2021-05-02 23:45:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:45:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 66 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 23:45:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:21,922 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:45:21,922 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 23:45:21,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 6377.5ms TimeCoverageRelationStatistics Valid=523, Invalid=17033, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:45:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 23:45:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-02 23:45:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-05-02 23:45:21,931 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 133 [2021-05-02 23:45:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:21,932 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-05-02 23:45:21,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 66 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-05-02 23:45:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 23:45:21,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:21,933 INFO L523 BasicCegarLoop]: trace histogram [62, 50, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:21,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:45:21,933 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash 797792324, now seen corresponding path program 12 times [2021-05-02 23:45:21,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:21,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163236560] [2021-05-02 23:45:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:21,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2201) (< v_main_~x~0_2201 99)) InVars {main_~x~0=v_main_~x~0_2201} OutVars{main_~x~0=v_main_~x~0_2201} AuxVars[] AssignedVars[] [2021-05-02 23:45:21,961 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:21,963 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:21,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:21,980 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:21,984 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:22,010 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:22,032 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2203 99) (< v_main_~x~0_2203 50)) InVars {main_~x~0=v_main_~x~0_2203} OutVars{main_~x~0=v_main_~x~0_2203} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,034 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:22,042 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,048 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:22,059 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:22,069 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:22,071 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2205 50) InVars {main_~x~0=v_main_~x~0_2205} OutVars{main_~x~0=v_main_~x~0_2205} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,072 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:22,080 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,086 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:22,094 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:22,112 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2207) (< v_main_~x~0_2207 100)) InVars {main_~x~0=v_main_~x~0_2207} OutVars{main_~x~0=v_main_~x~0_2207} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,115 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:22,116 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,130 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:22,133 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:22,158 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:22,177 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:22,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:24,979 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:24,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163236560] [2021-05-02 23:45:24,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163236560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:24,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:24,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:45:24,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684797824] [2021-05-02 23:45:24,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:45:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:24,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:45:24,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4912, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:45:24,981 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 67 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:34,404 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-05-02 23:45:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:45:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 67 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 23:45:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:34,405 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:45:34,405 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:45:34,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 7066.3ms TimeCoverageRelationStatistics Valid=507, Invalid=17583, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:45:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:45:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-02 23:45:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-05-02 23:45:34,415 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 135 [2021-05-02 23:45:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:34,416 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-05-02 23:45:34,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 67 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-05-02 23:45:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:45:34,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:34,417 INFO L523 BasicCegarLoop]: trace histogram [63, 50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:34,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:45:34,417 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1051050337, now seen corresponding path program 13 times [2021-05-02 23:45:34,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:34,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521205610] [2021-05-02 23:45:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:34,431 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2273) (< v_main_~x~0_2273 99)) InVars {main_~x~0=v_main_~x~0_2273} OutVars{main_~x~0=v_main_~x~0_2273} AuxVars[] AssignedVars[] [2021-05-02 23:45:34,436 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:34,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,439 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,452 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:34,455 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:34,486 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:34,515 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2275 99) (< v_main_~x~0_2275 50)) InVars {main_~x~0=v_main_~x~0_2275} OutVars{main_~x~0=v_main_~x~0_2275} AuxVars[] AssignedVars[] [2021-05-02 23:45:34,517 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:34,525 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,531 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:34,540 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:34,552 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:34,559 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2277 50) InVars {main_~x~0=v_main_~x~0_2277} OutVars{main_~x~0=v_main_~x~0_2277} AuxVars[] AssignedVars[] [2021-05-02 23:45:34,562 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:34,569 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,576 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:34,584 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:34,598 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2279) (< v_main_~x~0_2279 100)) InVars {main_~x~0=v_main_~x~0_2279} OutVars{main_~x~0=v_main_~x~0_2279} AuxVars[] AssignedVars[] [2021-05-02 23:45:34,605 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:34,607 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,626 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:34,630 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:34,670 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:34,692 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:34,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:34,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:37,923 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:37,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521205610] [2021-05-02 23:45:37,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521205610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:37,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:37,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:45:37,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626826864] [2021-05-02 23:45:37,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:45:37,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:37,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:45:37,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=5005, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:45:37,926 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 68 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:46,379 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2021-05-02 23:45:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:45:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 68 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 23:45:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:46,381 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:45:46,381 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 23:45:46,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3910 ImplicationChecksByTransitivity, 6902.1ms TimeCoverageRelationStatistics Valid=611, Invalid=18021, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:45:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 23:45:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 23:45:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 23:45:46,390 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2021-05-02 23:45:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:46,390 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 23:45:46,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 68 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 23:45:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 23:45:46,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:46,392 INFO L523 BasicCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:46,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:45:46,392 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash 327612986, now seen corresponding path program 14 times [2021-05-02 23:45:46,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:46,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112547844] [2021-05-02 23:45:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:46,403 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2346 99) (<= 50 v_main_~x~0_2346)) InVars {main_~x~0=v_main_~x~0_2346} OutVars{main_~x~0=v_main_~x~0_2346} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,405 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:46,406 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,411 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,425 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:46,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:46,454 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:46,473 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2348 99) (< v_main_~x~0_2348 50)) InVars {main_~x~0=v_main_~x~0_2348} OutVars{main_~x~0=v_main_~x~0_2348} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,475 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:46,477 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:46,497 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:46,508 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:46,510 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2350 50) InVars {main_~x~0=v_main_~x~0_2350} OutVars{main_~x~0=v_main_~x~0_2350} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,511 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:46,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,522 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:46,529 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:46,542 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2352 100) (<= 50 v_main_~x~0_2352)) InVars {main_~x~0=v_main_~x~0_2352} OutVars{main_~x~0=v_main_~x~0_2352} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,546 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:46,547 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,549 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:46,562 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:46,586 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:46,605 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:46,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:49,767 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:49,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112547844] [2021-05-02 23:45:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112547844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:49,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:49,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:45:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966393046] [2021-05-02 23:45:49,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:45:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:45:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5135, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:45:49,769 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 71 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 69 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:57,632 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2021-05-02 23:45:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:45:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 69 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 23:45:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:57,633 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:45:57,634 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 23:45:57,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 6446.2ms TimeCoverageRelationStatistics Valid=645, Invalid=18537, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:45:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 23:45:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 23:45:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-05-02 23:45:57,648 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 139 [2021-05-02 23:45:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:57,648 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-05-02 23:45:57,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 69 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-05-02 23:45:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 23:45:57,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:57,649 INFO L523 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:57,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:45:57,649 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1921828075, now seen corresponding path program 15 times [2021-05-02 23:45:57,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:57,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867164217] [2021-05-02 23:45:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:57,660 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2420 99) (<= 50 v_main_~x~0_2420)) InVars {main_~x~0=v_main_~x~0_2420} OutVars{main_~x~0=v_main_~x~0_2420} AuxVars[] AssignedVars[] [2021-05-02 23:45:57,662 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:57,683 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,686 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,702 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:57,706 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:57,723 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:57,746 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2422 50) (< v_main_~x~0_2422 99)) InVars {main_~x~0=v_main_~x~0_2422} OutVars{main_~x~0=v_main_~x~0_2422} AuxVars[] AssignedVars[] [2021-05-02 23:45:57,755 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:57,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,770 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:57,778 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:57,791 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:57,793 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2424 50) InVars {main_~x~0=v_main_~x~0_2424} OutVars{main_~x~0=v_main_~x~0_2424} AuxVars[] AssignedVars[] [2021-05-02 23:45:57,801 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:57,809 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,816 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:57,824 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:57,840 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2426) (< v_main_~x~0_2426 100)) InVars {main_~x~0=v_main_~x~0_2426} OutVars{main_~x~0=v_main_~x~0_2426} AuxVars[] AssignedVars[] [2021-05-02 23:45:57,842 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:57,843 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,845 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,858 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:57,861 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:57,891 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:57,910 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,023 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 23:45:58,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:01,729 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:01,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867164217] [2021-05-02 23:46:01,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [867164217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:01,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:01,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:46:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033403631] [2021-05-02 23:46:01,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:46:01,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:46:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5329, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:46:01,731 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 72 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 70 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:10,580 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2021-05-02 23:46:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:46:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 70 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-05-02 23:46:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:10,581 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:46:10,581 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 23:46:10,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 7803.7ms TimeCoverageRelationStatistics Valid=555, Invalid=19185, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:46:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 23:46:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 23:46:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-05-02 23:46:10,593 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2021-05-02 23:46:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:10,593 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-05-02 23:46:10,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 70 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-05-02 23:46:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:46:10,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:10,594 INFO L523 BasicCegarLoop]: trace histogram [66, 50, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:10,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:46:10,595 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1028829488, now seen corresponding path program 16 times [2021-05-02 23:46:10,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:10,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805849396] [2021-05-02 23:46:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:10,603 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2495 99) (<= 50 v_main_~x~0_2495)) InVars {main_~x~0=v_main_~x~0_2495} OutVars{main_~x~0=v_main_~x~0_2495} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,605 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:10,606 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,609 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,622 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:10,625 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:10,657 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:10,683 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2497 50) (< v_main_~x~0_2497 99)) InVars {main_~x~0=v_main_~x~0_2497} OutVars{main_~x~0=v_main_~x~0_2497} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,684 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:46:10,685 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,691 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:10,708 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:46:10,723 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:10,725 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2499 50) InVars {main_~x~0=v_main_~x~0_2499} OutVars{main_~x~0=v_main_~x~0_2499} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,726 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:46:10,734 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,741 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:10,751 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:46:10,768 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2501) (< v_main_~x~0_2501 100)) InVars {main_~x~0=v_main_~x~0_2501} OutVars{main_~x~0=v_main_~x~0_2501} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,770 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:10,787 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,790 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,805 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:10,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:10,828 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:10,852 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:10,976 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 23:46:10,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:14,524 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:14,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805849396] [2021-05-02 23:46:14,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805849396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:14,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:14,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:46:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927906662] [2021-05-02 23:46:14,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:46:14,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:46:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5476, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:46:14,526 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 73 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 71 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:23,391 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2021-05-02 23:46:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:46:23,392 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 71 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:46:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:23,393 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:46:23,393 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 23:46:23,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 7576.0ms TimeCoverageRelationStatistics Valid=563, Invalid=19743, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:46:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 23:46:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-05-02 23:46:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-05-02 23:46:23,404 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 143 [2021-05-02 23:46:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:23,404 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-05-02 23:46:23,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 71 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-05-02 23:46:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:46:23,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:23,405 INFO L523 BasicCegarLoop]: trace histogram [67, 50, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:23,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:46:23,406 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:23,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1932332171, now seen corresponding path program 17 times [2021-05-02 23:46:23,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:23,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546874653] [2021-05-02 23:46:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:23,417 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2571) (< v_main_~x~0_2571 99)) InVars {main_~x~0=v_main_~x~0_2571} OutVars{main_~x~0=v_main_~x~0_2571} AuxVars[] AssignedVars[] [2021-05-02 23:46:23,420 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:23,421 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:23,424 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:23,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:23,443 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:23,470 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:23,492 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2573 50) (< v_main_~x~0_2573 99)) InVars {main_~x~0=v_main_~x~0_2573} OutVars{main_~x~0=v_main_~x~0_2573} AuxVars[] AssignedVars[] [2021-05-02 23:46:23,494 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:46:23,500 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:23,506 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:23,513 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:46:23,524 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:23,526 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2575 50) InVars {main_~x~0=v_main_~x~0_2575} OutVars{main_~x~0=v_main_~x~0_2575} AuxVars[] AssignedVars[] [2021-05-02 23:46:23,528 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:46:23,534 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:23,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:23,546 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:46:23,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2577 100) (<= 50 v_main_~x~0_2577)) InVars {main_~x~0=v_main_~x~0_2577} OutVars{main_~x~0=v_main_~x~0_2577} AuxVars[] AssignedVars[] [2021-05-02 23:46:23,568 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:23,570 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:23,572 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:23,586 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:23,589 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:23,625 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:23,650 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:23,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:23,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:27,267 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:27,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546874653] [2021-05-02 23:46:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [546874653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:27,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:27,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:46:27,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799763574] [2021-05-02 23:46:27,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:46:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:46:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=5576, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:46:27,269 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 74 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 72 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:36,377 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2021-05-02 23:46:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:46:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 72 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 23:46:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:36,379 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:46:36,379 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:46:36,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 7297.9ms TimeCoverageRelationStatistics Valid=669, Invalid=20211, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:46:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:46:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 23:46:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 23:46:36,393 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 145 [2021-05-02 23:46:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:36,393 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 23:46:36,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 72 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 23:46:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:46:36,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:36,394 INFO L523 BasicCegarLoop]: trace histogram [68, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:36,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:46:36,395 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1679950554, now seen corresponding path program 18 times [2021-05-02 23:46:36,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:36,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855213340] [2021-05-02 23:46:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:36,407 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2648) (< v_main_~x~0_2648 99)) InVars {main_~x~0=v_main_~x~0_2648} OutVars{main_~x~0=v_main_~x~0_2648} AuxVars[] AssignedVars[] [2021-05-02 23:46:36,410 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:36,427 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,430 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,440 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:36,443 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:36,460 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:36,483 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2650 99) (< v_main_~x~0_2650 50)) InVars {main_~x~0=v_main_~x~0_2650} OutVars{main_~x~0=v_main_~x~0_2650} AuxVars[] AssignedVars[] [2021-05-02 23:46:36,485 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:46:36,486 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,492 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:36,506 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:46:36,519 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:36,520 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2652 50) InVars {main_~x~0=v_main_~x~0_2652} OutVars{main_~x~0=v_main_~x~0_2652} AuxVars[] AssignedVars[] [2021-05-02 23:46:36,522 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:46:36,523 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,530 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:36,545 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:46:36,561 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2654 100) (<= 50 v_main_~x~0_2654)) InVars {main_~x~0=v_main_~x~0_2654} OutVars{main_~x~0=v_main_~x~0_2654} AuxVars[] AssignedVars[] [2021-05-02 23:46:36,563 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:36,577 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,579 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,592 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:36,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:36,613 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:36,635 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:36,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:36,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:40,983 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:40,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855213340] [2021-05-02 23:46:40,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [855213340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:40,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:40,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:46:40,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383574569] [2021-05-02 23:46:40,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:46:40,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:46:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5776, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:46:40,985 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 75 states, 74 states have (on average 1.9324324324324325) internal successors, (143), 73 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:50,361 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-05-02 23:46:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:46:50,362 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.9324324324324325) internal successors, (143), 73 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 23:46:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:50,363 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:46:50,363 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 23:46:50,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 59 SyntacticMatches, 13 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 8412.8ms TimeCoverageRelationStatistics Valid=579, Invalid=20883, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 23:46:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 23:46:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 23:46:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-05-02 23:46:50,374 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 147 [2021-05-02 23:46:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:50,374 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-05-02 23:46:50,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 74 states have (on average 1.9324324324324325) internal successors, (143), 73 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-05-02 23:46:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:46:50,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:50,375 INFO L523 BasicCegarLoop]: trace histogram [69, 50, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:50,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:46:50,375 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1544893185, now seen corresponding path program 19 times [2021-05-02 23:46:50,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:50,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567997361] [2021-05-02 23:46:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:50,382 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2726) (< v_main_~x~0_2726 99)) InVars {main_~x~0=v_main_~x~0_2726} OutVars{main_~x~0=v_main_~x~0_2726} AuxVars[] AssignedVars[] [2021-05-02 23:46:50,384 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:50,399 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:50,401 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:50,411 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:50,413 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:50,428 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:50,449 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2728 50) (< v_main_~x~0_2728 99)) InVars {main_~x~0=v_main_~x~0_2728} OutVars{main_~x~0=v_main_~x~0_2728} AuxVars[] AssignedVars[] [2021-05-02 23:46:50,450 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:46:50,451 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:50,456 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:50,469 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:46:50,480 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:50,482 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2730 50) InVars {main_~x~0=v_main_~x~0_2730} OutVars{main_~x~0=v_main_~x~0_2730} AuxVars[] AssignedVars[] [2021-05-02 23:46:50,483 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:46:50,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:50,494 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:50,501 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:46:50,514 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2732) (< v_main_~x~0_2732 100)) InVars {main_~x~0=v_main_~x~0_2732} OutVars{main_~x~0=v_main_~x~0_2732} AuxVars[] AssignedVars[] [2021-05-02 23:46:50,516 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:50,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:50,529 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:50,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:50,546 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:50,581 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:50,605 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:50,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:50,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:54,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:54,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567997361] [2021-05-02 23:46:54,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567997361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:54,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:54,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:46:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086869682] [2021-05-02 23:46:54,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:46:54,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:54,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:46:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5880, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:46:54,213 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 74 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:03,666 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2021-05-02 23:47:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:47:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 74 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2021-05-02 23:47:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:03,667 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:47:03,667 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:47:03,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 58 SyntacticMatches, 15 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 7439.0ms TimeCoverageRelationStatistics Valid=685, Invalid=21367, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 23:47:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:47:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-05-02 23:47:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-05-02 23:47:03,678 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2021-05-02 23:47:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:03,678 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-05-02 23:47:03,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 74 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-05-02 23:47:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 23:47:03,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:03,679 INFO L523 BasicCegarLoop]: trace histogram [70, 50, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:03,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:47:03,679 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash -346661348, now seen corresponding path program 20 times [2021-05-02 23:47:03,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:03,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068339488] [2021-05-02 23:47:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:03,687 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2805) (< v_main_~x~0_2805 99)) InVars {main_~x~0=v_main_~x~0_2805} OutVars{main_~x~0=v_main_~x~0_2805} AuxVars[] AssignedVars[] [2021-05-02 23:47:03,688 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:03,689 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,691 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,702 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:03,704 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:03,726 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:03,746 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2807 50) (< v_main_~x~0_2807 99)) InVars {main_~x~0=v_main_~x~0_2807} OutVars{main_~x~0=v_main_~x~0_2807} AuxVars[] AssignedVars[] [2021-05-02 23:47:03,747 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:47:03,748 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,753 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:03,768 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:47:03,779 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:03,780 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2809 50) InVars {main_~x~0=v_main_~x~0_2809} OutVars{main_~x~0=v_main_~x~0_2809} AuxVars[] AssignedVars[] [2021-05-02 23:47:03,781 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:47:03,782 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,787 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:03,799 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:47:03,812 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2811) (< v_main_~x~0_2811 100)) InVars {main_~x~0=v_main_~x~0_2811} OutVars{main_~x~0=v_main_~x~0_2811} AuxVars[] AssignedVars[] [2021-05-02 23:47:03,813 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:03,814 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,816 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,826 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:03,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:03,857 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:03,876 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:03,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:03,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:07,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068339488] [2021-05-02 23:47:07,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068339488] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:07,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:07,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:47:07,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802777281] [2021-05-02 23:47:07,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:47:07,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:47:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6035, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:47:07,371 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 75 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:16,851 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2021-05-02 23:47:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:47:16,852 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 75 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 23:47:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:16,853 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:47:16,853 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 23:47:16,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 60 SyntacticMatches, 14 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 7239.3ms TimeCoverageRelationStatistics Valid=693, Invalid=21957, Unknown=0, NotChecked=0, Total=22650 [2021-05-02 23:47:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 23:47:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-02 23:47:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-05-02 23:47:16,862 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 151 [2021-05-02 23:47:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:16,862 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-05-02 23:47:16,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 75 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-05-02 23:47:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:47:16,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:16,863 INFO L523 BasicCegarLoop]: trace histogram [71, 50, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:16,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:47:16,863 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:16,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1359401353, now seen corresponding path program 21 times [2021-05-02 23:47:16,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:16,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006418185] [2021-05-02 23:47:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:16,870 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2885 99) (<= 50 v_main_~x~0_2885)) InVars {main_~x~0=v_main_~x~0_2885} OutVars{main_~x~0=v_main_~x~0_2885} AuxVars[] AssignedVars[] [2021-05-02 23:47:16,873 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:16,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:16,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:16,886 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:16,888 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:16,913 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:16,933 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2887 99) (< v_main_~x~0_2887 50)) InVars {main_~x~0=v_main_~x~0_2887} OutVars{main_~x~0=v_main_~x~0_2887} AuxVars[] AssignedVars[] [2021-05-02 23:47:16,943 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:47:16,944 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:16,949 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:16,960 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:47:16,971 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:16,973 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2889 50) InVars {main_~x~0=v_main_~x~0_2889} OutVars{main_~x~0=v_main_~x~0_2889} AuxVars[] AssignedVars[] [2021-05-02 23:47:16,985 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:47:16,986 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:16,991 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:17,004 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:47:17,017 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2891 100) (<= 50 v_main_~x~0_2891)) InVars {main_~x~0=v_main_~x~0_2891} OutVars{main_~x~0=v_main_~x~0_2891} AuxVars[] AssignedVars[] [2021-05-02 23:47:17,018 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:17,019 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:17,021 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:17,031 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:17,033 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:17,058 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:17,083 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:17,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:17,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:21,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:21,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006418185] [2021-05-02 23:47:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006418185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:21,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:21,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:47:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189015765] [2021-05-02 23:47:21,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:47:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:47:21,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=6192, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:47:21,440 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 78 states, 77 states have (on average 1.9350649350649352) internal successors, (149), 76 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:34,222 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2021-05-02 23:47:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:47:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.9350649350649352) internal successors, (149), 76 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 23:47:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:34,225 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:47:34,225 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:47:34,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 61 SyntacticMatches, 14 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5326 ImplicationChecksByTransitivity, 9384.5ms TimeCoverageRelationStatistics Valid=701, Invalid=22555, Unknown=0, NotChecked=0, Total=23256 [2021-05-02 23:47:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:47:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-02 23:47:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 23:47:34,237 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 153 [2021-05-02 23:47:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:34,238 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 23:47:34,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 77 states have (on average 1.9350649350649352) internal successors, (149), 76 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 23:47:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:47:34,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:34,239 INFO L523 BasicCegarLoop]: trace histogram [72, 50, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:34,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:47:34,239 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 355030034, now seen corresponding path program 22 times [2021-05-02 23:47:34,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:34,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330399214] [2021-05-02 23:47:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:34,252 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2966) (< v_main_~x~0_2966 99)) InVars {main_~x~0=v_main_~x~0_2966} OutVars{main_~x~0=v_main_~x~0_2966} AuxVars[] AssignedVars[] [2021-05-02 23:47:34,255 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:34,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,261 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,282 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:34,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:34,324 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:34,360 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_2968 99) (< v_main_~x~0_2968 50)) InVars {main_~x~0=v_main_~x~0_2968} OutVars{main_~x~0=v_main_~x~0_2968} AuxVars[] AssignedVars[] [2021-05-02 23:47:34,361 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:47:34,372 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:34,390 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:47:34,406 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:34,408 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_2970 50) InVars {main_~x~0=v_main_~x~0_2970} OutVars{main_~x~0=v_main_~x~0_2970} AuxVars[] AssignedVars[] [2021-05-02 23:47:34,410 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:47:34,420 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:34,440 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:47:34,465 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_2972) (< v_main_~x~0_2972 100)) InVars {main_~x~0=v_main_~x~0_2972} OutVars{main_~x~0=v_main_~x~0_2972} AuxVars[] AssignedVars[] [2021-05-02 23:47:34,467 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:34,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,472 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,499 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:34,504 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:34,546 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:34,590 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:34,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:39,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:39,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330399214] [2021-05-02 23:47:39,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [330399214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:39,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:39,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:47:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560289137] [2021-05-02 23:47:39,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:47:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:47:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=6422, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:47:39,511 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 79 states, 78 states have (on average 1.935897435897436) internal successors, (151), 77 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:52,419 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2021-05-02 23:47:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:47:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.935897435897436) internal successors, (151), 77 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 23:47:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:52,421 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:47:52,421 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:47:52,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 9898.7ms TimeCoverageRelationStatistics Valid=567, Invalid=23303, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 23:47:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:47:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-02 23:47:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-05-02 23:47:52,429 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2021-05-02 23:47:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:52,429 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-05-02 23:47:52,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.935897435897436) internal successors, (151), 77 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-05-02 23:47:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 23:47:52,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:52,430 INFO L523 BasicCegarLoop]: trace histogram [73, 50, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:52,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:47:52,430 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1343848723, now seen corresponding path program 23 times [2021-05-02 23:47:52,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:52,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116130266] [2021-05-02 23:47:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:52,443 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_3048) (< v_main_~x~0_3048 99)) InVars {main_~x~0=v_main_~x~0_3048} OutVars{main_~x~0=v_main_~x~0_3048} AuxVars[] AssignedVars[] [2021-05-02 23:47:52,444 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:52,457 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:52,459 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:52,468 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:52,471 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:52,486 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:52,508 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3050 50) (< v_main_~x~0_3050 99)) InVars {main_~x~0=v_main_~x~0_3050} OutVars{main_~x~0=v_main_~x~0_3050} AuxVars[] AssignedVars[] [2021-05-02 23:47:52,510 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:47:52,511 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:52,516 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:52,529 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:47:52,542 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:52,543 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3052 50) InVars {main_~x~0=v_main_~x~0_3052} OutVars{main_~x~0=v_main_~x~0_3052} AuxVars[] AssignedVars[] [2021-05-02 23:47:52,544 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:47:52,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:52,550 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:52,562 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:47:52,575 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3054 100) (<= 50 v_main_~x~0_3054)) InVars {main_~x~0=v_main_~x~0_3054} OutVars{main_~x~0=v_main_~x~0_3054} AuxVars[] AssignedVars[] [2021-05-02 23:47:52,577 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:52,578 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:52,579 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:52,590 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:52,593 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:52,619 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:52,639 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:52,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:57,419 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116130266] [2021-05-02 23:47:57,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116130266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:57,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:57,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:47:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960503554] [2021-05-02 23:47:57,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:47:57,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:47:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=6512, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:47:57,421 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 78 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:09,417 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2021-05-02 23:48:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:48:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 78 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 23:48:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:09,419 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:48:09,419 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:48:09,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 63 SyntacticMatches, 14 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5781 ImplicationChecksByTransitivity, 9387.1ms TimeCoverageRelationStatistics Valid=717, Invalid=23775, Unknown=0, NotChecked=0, Total=24492 [2021-05-02 23:48:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:48:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-05-02 23:48:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-05-02 23:48:09,427 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 157 [2021-05-02 23:48:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:09,428 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-05-02 23:48:09,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 78 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-05-02 23:48:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 23:48:09,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:09,429 INFO L523 BasicCegarLoop]: trace histogram [74, 50, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:09,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:48:09,429 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1878761720, now seen corresponding path program 24 times [2021-05-02 23:48:09,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:09,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055907660] [2021-05-02 23:48:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:09,438 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_3131) (< v_main_~x~0_3131 99)) InVars {main_~x~0=v_main_~x~0_3131} OutVars{main_~x~0=v_main_~x~0_3131} AuxVars[] AssignedVars[] [2021-05-02 23:48:09,440 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:09,458 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:09,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:09,475 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:09,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:09,501 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:09,533 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3133 50) (< v_main_~x~0_3133 99)) InVars {main_~x~0=v_main_~x~0_3133} OutVars{main_~x~0=v_main_~x~0_3133} AuxVars[] AssignedVars[] [2021-05-02 23:48:09,535 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:48:09,544 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:09,550 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:09,558 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:48:09,570 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:09,572 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3135 50) InVars {main_~x~0=v_main_~x~0_3135} OutVars{main_~x~0=v_main_~x~0_3135} AuxVars[] AssignedVars[] [2021-05-02 23:48:09,573 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:48:09,574 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:09,579 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:09,593 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:48:09,608 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_3137) (< v_main_~x~0_3137 100)) InVars {main_~x~0=v_main_~x~0_3137} OutVars{main_~x~0=v_main_~x~0_3137} AuxVars[] AssignedVars[] [2021-05-02 23:48:09,612 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:09,626 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:09,628 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:09,638 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:09,641 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:09,658 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:09,681 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:09,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:09,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:16,647 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:16,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055907660] [2021-05-02 23:48:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055907660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:48:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398615147] [2021-05-02 23:48:16,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:48:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:48:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6724, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:48:16,649 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 81 states, 80 states have (on average 1.9375) internal successors, (155), 79 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:38,444 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2021-05-02 23:48:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:48:38,445 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.9375) internal successors, (155), 79 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 23:48:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:38,446 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:48:38,446 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 23:48:38,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 16065.7ms TimeCoverageRelationStatistics Valid=627, Invalid=24495, Unknown=0, NotChecked=0, Total=25122 [2021-05-02 23:48:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 23:48:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-05-02 23:48:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-05-02 23:48:38,459 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 159 [2021-05-02 23:48:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:38,460 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-05-02 23:48:38,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 80 states have (on average 1.9375) internal successors, (155), 79 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-05-02 23:48:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:48:38,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:38,461 INFO L523 BasicCegarLoop]: trace histogram [75, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:38,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:48:38,461 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash -534076317, now seen corresponding path program 25 times [2021-05-02 23:48:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:38,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039742708] [2021-05-02 23:48:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:38,474 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3215 99) (<= 50 v_main_~x~0_3215)) InVars {main_~x~0=v_main_~x~0_3215} OutVars{main_~x~0=v_main_~x~0_3215} AuxVars[] AssignedVars[] [2021-05-02 23:48:38,477 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:38,479 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,481 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:38,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:38,545 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:38,574 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3217 99) (< v_main_~x~0_3217 50)) InVars {main_~x~0=v_main_~x~0_3217} OutVars{main_~x~0=v_main_~x~0_3217} AuxVars[] AssignedVars[] [2021-05-02 23:48:38,576 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:48:38,586 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:38,606 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:48:38,629 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:38,633 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3219 50) InVars {main_~x~0=v_main_~x~0_3219} OutVars{main_~x~0=v_main_~x~0_3219} AuxVars[] AssignedVars[] [2021-05-02 23:48:38,635 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:48:38,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,660 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:38,676 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:48:38,701 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3221 100) (<= 50 v_main_~x~0_3221)) InVars {main_~x~0=v_main_~x~0_3221} OutVars{main_~x~0=v_main_~x~0_3221} AuxVars[] AssignedVars[] [2021-05-02 23:48:38,703 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:38,704 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,707 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,726 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:38,731 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:38,775 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:38,811 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:38,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:44,149 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:44,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039742708] [2021-05-02 23:48:44,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039742708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:44,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:44,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:48:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57677631] [2021-05-02 23:48:44,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:48:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:48:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=6840, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:48:44,151 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 82 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 80 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:57,625 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2021-05-02 23:48:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:48:57,626 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 80 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 23:48:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:57,627 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:48:57,627 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:48:57,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 67 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5982 ImplicationChecksByTransitivity, 10386.5ms TimeCoverageRelationStatistics Valid=733, Invalid=25027, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 23:48:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:48:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 23:48:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 23:48:57,639 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 161 [2021-05-02 23:48:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:57,639 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 23:48:57,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 80 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 23:48:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 23:48:57,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:57,641 INFO L523 BasicCegarLoop]: trace histogram [76, 50, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:57,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:48:57,641 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:57,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1076560130, now seen corresponding path program 26 times [2021-05-02 23:48:57,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:57,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438282705] [2021-05-02 23:48:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:57,652 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3300 99) (<= 50 v_main_~x~0_3300)) InVars {main_~x~0=v_main_~x~0_3300} OutVars{main_~x~0=v_main_~x~0_3300} AuxVars[] AssignedVars[] [2021-05-02 23:48:57,655 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:57,676 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,679 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,695 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:57,700 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:57,727 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:57,762 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3302 50) (< v_main_~x~0_3302 99)) InVars {main_~x~0=v_main_~x~0_3302} OutVars{main_~x~0=v_main_~x~0_3302} AuxVars[] AssignedVars[] [2021-05-02 23:48:57,764 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:48:57,775 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,784 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:57,795 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:48:57,819 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:57,823 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3304 50) InVars {main_~x~0=v_main_~x~0_3304} OutVars{main_~x~0=v_main_~x~0_3304} AuxVars[] AssignedVars[] [2021-05-02 23:48:57,825 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:48:57,834 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:57,852 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:48:57,870 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3306 100) (<= 50 v_main_~x~0_3306)) InVars {main_~x~0=v_main_~x~0_3306} OutVars{main_~x~0=v_main_~x~0_3306} AuxVars[] AssignedVars[] [2021-05-02 23:48:57,872 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:57,891 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,894 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,904 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:57,907 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:57,925 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:57,950 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:58,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:03,436 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438282705] [2021-05-02 23:49:03,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [438282705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:03,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:03,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:49:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753752047] [2021-05-02 23:49:03,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:49:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:49:03,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=7033, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:49:03,437 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 83 states, 82 states have (on average 1.9390243902439024) internal successors, (159), 81 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:20,462 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2021-05-02 23:49:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:49:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9390243902439024) internal successors, (159), 81 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 23:49:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:20,466 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:49:20,466 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 23:49:20,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 65 SyntacticMatches, 15 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6333 ImplicationChecksByTransitivity, 11367.5ms TimeCoverageRelationStatistics Valid=689, Invalid=25717, Unknown=0, NotChecked=0, Total=26406 [2021-05-02 23:49:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 23:49:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 23:49:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-05-02 23:49:20,477 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 163 [2021-05-02 23:49:20,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:20,478 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-05-02 23:49:20,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 82 states have (on average 1.9390243902439024) internal successors, (159), 81 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-05-02 23:49:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:49:20,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:20,479 INFO L523 BasicCegarLoop]: trace histogram [77, 50, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:20,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:49:20,480 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1582505689, now seen corresponding path program 27 times [2021-05-02 23:49:20,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:20,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131689151] [2021-05-02 23:49:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:20,526 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3386 99) (<= 50 v_main_~x~0_3386)) InVars {main_~x~0=v_main_~x~0_3386} OutVars{main_~x~0=v_main_~x~0_3386} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,529 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:49:20,564 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,570 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,592 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:20,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:20,633 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:49:20,680 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3388 50) (< v_main_~x~0_3388 99)) InVars {main_~x~0=v_main_~x~0_3388} OutVars{main_~x~0=v_main_~x~0_3388} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,683 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:49:20,698 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,710 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:20,726 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:49:20,750 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:20,754 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3390 50) InVars {main_~x~0=v_main_~x~0_3390} OutVars{main_~x~0=v_main_~x~0_3390} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,756 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:49:20,769 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,781 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:20,796 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:49:20,831 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3392 100) (<= 50 v_main_~x~0_3392)) InVars {main_~x~0=v_main_~x~0_3392} OutVars{main_~x~0=v_main_~x~0_3392} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,834 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:49:20,862 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,866 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,891 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:20,897 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:20,932 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:49:20,974 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:21,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:29,163 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:29,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131689151] [2021-05-02 23:49:29,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [131689151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:29,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:29,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:49:29,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183959936] [2021-05-02 23:49:29,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:49:29,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:49:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=7203, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:49:29,165 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 84 states, 83 states have (on average 1.9397590361445782) internal successors, (161), 82 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:54,367 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2021-05-02 23:49:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:49:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.9397590361445782) internal successors, (161), 82 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 23:49:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:54,370 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:49:54,371 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:49:54,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 65 SyntacticMatches, 16 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 17205.5ms TimeCoverageRelationStatistics Valid=695, Invalid=26365, Unknown=0, NotChecked=0, Total=27060 [2021-05-02 23:49:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:49:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-05-02 23:49:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-05-02 23:49:54,383 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 165 [2021-05-02 23:49:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:54,383 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-05-02 23:49:54,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.9397590361445782) internal successors, (161), 82 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-05-02 23:49:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:49:54,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:54,384 INFO L523 BasicCegarLoop]: trace histogram [78, 50, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:54,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:49:54,384 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1439216628, now seen corresponding path program 28 times [2021-05-02 23:49:54,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:54,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345324485] [2021-05-02 23:49:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:54,401 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3473 99) (<= 50 v_main_~x~0_3473)) InVars {main_~x~0=v_main_~x~0_3473} OutVars{main_~x~0=v_main_~x~0_3473} AuxVars[] AssignedVars[] [2021-05-02 23:49:54,404 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:49:54,434 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:54,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:54,457 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:54,463 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:54,500 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:49:54,557 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3475 99) (< v_main_~x~0_3475 50)) InVars {main_~x~0=v_main_~x~0_3475} OutVars{main_~x~0=v_main_~x~0_3475} AuxVars[] AssignedVars[] [2021-05-02 23:49:54,559 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:49:54,577 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:54,593 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:54,611 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:49:54,643 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:54,647 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3477 50) InVars {main_~x~0=v_main_~x~0_3477} OutVars{main_~x~0=v_main_~x~0_3477} AuxVars[] AssignedVars[] [2021-05-02 23:49:54,649 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:49:54,663 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:54,676 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:54,693 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:49:54,727 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3479 100) (<= 50 v_main_~x~0_3479)) InVars {main_~x~0=v_main_~x~0_3479} OutVars{main_~x~0=v_main_~x~0_3479} AuxVars[] AssignedVars[] [2021-05-02 23:49:54,730 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:49:54,732 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:54,735 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:54,758 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:54,763 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:54,822 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:49:54,868 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:55,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:55,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:02,040 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:02,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345324485] [2021-05-02 23:50:02,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345324485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:02,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:02,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:50:02,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043936412] [2021-05-02 23:50:02,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:50:02,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:02,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:50:02,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=7375, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:50:02,042 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 85 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 83 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:22,372 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2021-05-02 23:50:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:50:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 83 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 23:50:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:22,377 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:50:22,377 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:50:22,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6690 ImplicationChecksByTransitivity, 14052.6ms TimeCoverageRelationStatistics Valid=701, Invalid=27021, Unknown=0, NotChecked=0, Total=27722 [2021-05-02 23:50:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:50:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-05-02 23:50:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-05-02 23:50:22,389 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 167 [2021-05-02 23:50:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:22,389 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-05-02 23:50:22,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 83 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-05-02 23:50:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:50:22,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:22,391 INFO L523 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:22,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:50:22,391 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1177382479, now seen corresponding path program 29 times [2021-05-02 23:50:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:22,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312208530] [2021-05-02 23:50:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:22,413 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3561 99) (<= 50 v_main_~x~0_3561)) InVars {main_~x~0=v_main_~x~0_3561} OutVars{main_~x~0=v_main_~x~0_3561} AuxVars[] AssignedVars[] [2021-05-02 23:50:22,417 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:50:22,420 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:22,427 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:22,466 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:22,474 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:22,565 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:50:22,650 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3563 50) (< v_main_~x~0_3563 99)) InVars {main_~x~0=v_main_~x~0_3563} OutVars{main_~x~0=v_main_~x~0_3563} AuxVars[] AssignedVars[] [2021-05-02 23:50:22,654 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:50:22,656 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:22,676 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:22,723 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:50:22,774 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:22,779 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3565 50) InVars {main_~x~0=v_main_~x~0_3565} OutVars{main_~x~0=v_main_~x~0_3565} AuxVars[] AssignedVars[] [2021-05-02 23:50:22,782 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:50:22,802 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:22,818 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:22,846 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:50:22,908 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3567 100) (<= 50 v_main_~x~0_3567)) InVars {main_~x~0=v_main_~x~0_3567} OutVars{main_~x~0=v_main_~x~0_3567} AuxVars[] AssignedVars[] [2021-05-02 23:50:22,911 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:50:22,954 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:22,960 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:22,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:22,997 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:23,051 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:50:23,139 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:23,423 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 23:50:23,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:29,342 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:29,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312208530] [2021-05-02 23:50:29,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1312208530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:29,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:29,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:50:29,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339855962] [2021-05-02 23:50:29,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:50:29,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:50:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=7598, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:50:29,344 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 86 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 84 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:01,968 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2021-05-02 23:51:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:51:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 84 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 23:51:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:01,973 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:51:01,973 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:51:01,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6984 ImplicationChecksByTransitivity, 17151.1ms TimeCoverageRelationStatistics Valid=609, Invalid=27783, Unknown=0, NotChecked=0, Total=28392 [2021-05-02 23:51:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:51:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 23:51:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 23:51:01,983 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 169 [2021-05-02 23:51:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:01,984 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 23:51:01,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 84 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 23:51:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 23:51:01,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:01,985 INFO L523 BasicCegarLoop]: trace histogram [80, 50, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:01,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-02 23:51:01,985 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:01,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1337131542, now seen corresponding path program 30 times [2021-05-02 23:51:01,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:01,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952830625] [2021-05-02 23:51:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:02,001 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_3650) (< v_main_~x~0_3650 99)) InVars {main_~x~0=v_main_~x~0_3650} OutVars{main_~x~0=v_main_~x~0_3650} AuxVars[] AssignedVars[] [2021-05-02 23:51:02,005 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:51:02,007 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,039 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:02,046 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:02,120 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:51:02,197 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3652 99) (< v_main_~x~0_3652 50)) InVars {main_~x~0=v_main_~x~0_3652} OutVars{main_~x~0=v_main_~x~0_3652} AuxVars[] AssignedVars[] [2021-05-02 23:51:02,201 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:51:02,203 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,220 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:02,260 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:51:02,300 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:02,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3654 50) InVars {main_~x~0=v_main_~x~0_3654} OutVars{main_~x~0=v_main_~x~0_3654} AuxVars[] AssignedVars[] [2021-05-02 23:51:02,307 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:51:02,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,344 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:02,367 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:51:02,412 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3656 100) (<= 50 v_main_~x~0_3656)) InVars {main_~x~0=v_main_~x~0_3656} OutVars{main_~x~0=v_main_~x~0_3656} AuxVars[] AssignedVars[] [2021-05-02 23:51:02,415 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:51:02,449 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,467 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,499 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:02,508 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:02,561 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:51:02,635 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:03,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:03,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:03,159 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13 [2021-05-02 23:51:14,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:14,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952830625] [2021-05-02 23:51:14,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [952830625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:14,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:14,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:51:14,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419499958] [2021-05-02 23:51:14,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:51:14,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:14,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:51:14,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7744, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:51:14,379 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 87 states, 86 states have (on average 1.941860465116279) internal successors, (167), 85 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:47,228 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2021-05-02 23:51:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:51:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.941860465116279) internal successors, (167), 85 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 23:51:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:47,230 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:51:47,230 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 23:51:47,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 67 SyntacticMatches, 17 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3835 ImplicationChecksByTransitivity, 23477.6ms TimeCoverageRelationStatistics Valid=675, Invalid=28395, Unknown=0, NotChecked=0, Total=29070 [2021-05-02 23:51:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 23:51:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 23:51:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-05-02 23:51:47,242 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 171 [2021-05-02 23:51:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:47,242 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-05-02 23:51:47,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 86 states have (on average 1.941860465116279) internal successors, (167), 85 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-05-02 23:51:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:51:47,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:47,243 INFO L523 BasicCegarLoop]: trace histogram [81, 50, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:47,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-02 23:51:47,244 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash 281481925, now seen corresponding path program 31 times [2021-05-02 23:51:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:47,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081429989] [2021-05-02 23:51:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:47,256 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3740 99) (<= 50 v_main_~x~0_3740)) InVars {main_~x~0=v_main_~x~0_3740} OutVars{main_~x~0=v_main_~x~0_3740} AuxVars[] AssignedVars[] [2021-05-02 23:51:47,258 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:51:47,286 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:47,289 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:47,309 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:47,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:47,346 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:51:47,392 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3742 50) (< v_main_~x~0_3742 99)) InVars {main_~x~0=v_main_~x~0_3742} OutVars{main_~x~0=v_main_~x~0_3742} AuxVars[] AssignedVars[] [2021-05-02 23:51:47,394 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:51:47,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:47,405 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:47,437 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:51:47,463 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:47,466 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3744 50) InVars {main_~x~0=v_main_~x~0_3744} OutVars{main_~x~0=v_main_~x~0_3744} AuxVars[] AssignedVars[] [2021-05-02 23:51:47,468 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:51:47,479 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:47,489 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:47,504 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:51:47,533 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_3746) (< v_main_~x~0_3746 100)) InVars {main_~x~0=v_main_~x~0_3746} OutVars{main_~x~0=v_main_~x~0_3746} AuxVars[] AssignedVars[] [2021-05-02 23:51:47,535 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:51:47,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:47,563 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:47,581 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:47,586 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:47,615 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:51:47,658 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:54,520 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:54,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081429989] [2021-05-02 23:51:54,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081429989] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:54,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:54,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:51:54,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470316544] [2021-05-02 23:51:54,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:51:54,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:51:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=7903, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:51:54,523 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 88 states, 87 states have (on average 1.9425287356321839) internal successors, (169), 86 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:27,616 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2021-05-02 23:52:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:52:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.9425287356321839) internal successors, (169), 86 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 23:52:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:27,623 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:52:27,623 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:52:27,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 68 SyntacticMatches, 17 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7475 ImplicationChecksByTransitivity, 17271.0ms TimeCoverageRelationStatistics Valid=719, Invalid=29037, Unknown=0, NotChecked=0, Total=29756 [2021-05-02 23:52:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:52:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-05-02 23:52:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-05-02 23:52:27,639 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 173 [2021-05-02 23:52:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:27,640 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-05-02 23:52:27,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.9425287356321839) internal successors, (169), 86 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-05-02 23:52:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:52:27,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:27,641 INFO L523 BasicCegarLoop]: trace histogram [82, 50, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:27,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-02 23:52:27,642 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash 990862560, now seen corresponding path program 32 times [2021-05-02 23:52:27,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:27,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487507222] [2021-05-02 23:52:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:27,663 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3831 99) (<= 50 v_main_~x~0_3831)) InVars {main_~x~0=v_main_~x~0_3831} OutVars{main_~x~0=v_main_~x~0_3831} AuxVars[] AssignedVars[] [2021-05-02 23:52:27,667 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:52:27,723 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:27,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:27,771 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:27,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:27,837 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:52:27,944 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3833 50) (< v_main_~x~0_3833 99)) InVars {main_~x~0=v_main_~x~0_3833} OutVars{main_~x~0=v_main_~x~0_3833} AuxVars[] AssignedVars[] [2021-05-02 23:52:27,947 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:52:27,950 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:27,967 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:28,016 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:52:28,063 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:28,070 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3835 50) InVars {main_~x~0=v_main_~x~0_3835} OutVars{main_~x~0=v_main_~x~0_3835} AuxVars[] AssignedVars[] [2021-05-02 23:52:28,073 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:52:28,076 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:28,096 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:28,154 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:52:28,217 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3837 100) (<= 50 v_main_~x~0_3837)) InVars {main_~x~0=v_main_~x~0_3837} OutVars{main_~x~0=v_main_~x~0_3837} AuxVars[] AssignedVars[] [2021-05-02 23:52:28,221 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:52:28,224 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:28,228 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:28,262 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:28,271 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:28,381 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:52:28,483 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:28,959 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 13 [2021-05-02 23:52:41,787 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:41,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487507222] [2021-05-02 23:52:41,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487507222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:41,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:41,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:52:41,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407411224] [2021-05-02 23:52:41,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:52:41,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:52:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=8051, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:52:41,789 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 89 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 87 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:37,429 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2021-05-02 23:53:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:53:37,435 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 87 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 23:53:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:37,436 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:53:37,436 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:53:37,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7424 ImplicationChecksByTransitivity, 29159.7ms TimeCoverageRelationStatistics Valid=789, Invalid=29661, Unknown=0, NotChecked=0, Total=30450 [2021-05-02 23:53:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:53:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-05-02 23:53:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-05-02 23:53:37,460 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 175 [2021-05-02 23:53:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:37,460 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-05-02 23:53:37,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 87 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-05-02 23:53:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 23:53:37,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:37,462 INFO L523 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:37,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-02 23:53:37,462 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash -194147269, now seen corresponding path program 33 times [2021-05-02 23:53:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:37,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569508538] [2021-05-02 23:53:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:37,492 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~x~0_3923) (< v_main_~x~0_3923 99)) InVars {main_~x~0=v_main_~x~0_3923} OutVars{main_~x~0=v_main_~x~0_3923} AuxVars[] AssignedVars[] [2021-05-02 23:53:37,496 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:53:37,551 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:37,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:37,609 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:37,621 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:37,697 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:53:37,827 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 23:53:37,839 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3925 50) (< v_main_~x~0_3925 99)) InVars {main_~x~0=v_main_~x~0_3925} OutVars{main_~x~0=v_main_~x~0_3925} AuxVars[] AssignedVars[] [2021-05-02 23:53:37,843 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:53:37,846 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:37,870 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:37,938 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:53:38,013 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:38,019 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_3927 50) InVars {main_~x~0=v_main_~x~0_3927} OutVars{main_~x~0=v_main_~x~0_3927} AuxVars[] AssignedVars[] [2021-05-02 23:53:38,023 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:53:38,050 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:38,075 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:38,109 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:53:38,193 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_3929 100) (<= 50 v_main_~x~0_3929)) InVars {main_~x~0=v_main_~x~0_3929} OutVars{main_~x~0=v_main_~x~0_3929} AuxVars[] AssignedVars[] [2021-05-02 23:53:38,198 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:53:38,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:38,262 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:38,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:38,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:38,403 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:53:38,522 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 23:53:38,529 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:39,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:39,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:39,261 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13