/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-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:44:46,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:44:46,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:44:46,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:44:46,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:44:46,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:44:46,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:44:46,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:44:46,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:44:46,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:44:46,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:44:46,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:44:46,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:44:46,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:44:46,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:44:46,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:44:46,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:44:46,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:44:46,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:44:46,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:44:46,612 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 23:44:46,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:44:46,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:44:46,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:44:46,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:44:46,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:44:46,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:44:46,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:44:46,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:44:46,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:44:46,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:44:46,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:44:46,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:44:46,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:44:46,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:44:46,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:44:46,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:44:46,638 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:44:46,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:44:46,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:44:47,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:44:47,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:44:47,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:44:47,020 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:44:47,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2021-05-02 23:44:47,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0a22289/28c5db3e19994a5cbdf7870590ab6e61/FLAG6697965a2 [2021-05-02 23:44:47,525 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:44:47,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2021-05-02 23:44:47,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0a22289/28c5db3e19994a5cbdf7870590ab6e61/FLAG6697965a2 [2021-05-02 23:44:47,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0a22289/28c5db3e19994a5cbdf7870590ab6e61 [2021-05-02 23:44:47,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:44:47,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:44:47,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:44:47,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:44:47,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:44:47,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9482eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47, skipping insertion in model container [2021-05-02 23:44:47,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:44:47,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:44:47,751 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-new/count_by_1.i[891,904] [2021-05-02 23:44:47,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:44:47,773 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:44:47,784 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-new/count_by_1.i[891,904] [2021-05-02 23:44:47,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:44:47,818 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:44:47,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47 WrapperNode [2021-05-02 23:44:47,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:44:47,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:44:47,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:44:47,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:44:47,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (1/1) ... [2021-05-02 23:44:47,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:44:47,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:44:47,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:44:47,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:44:47,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (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 23:44:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:44:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:44:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:44:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:44:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:44:47,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:44:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:44:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:44:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:44:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:44:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:44:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:44:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:44:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:44:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:44:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:44:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:44:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:44:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:44:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:44:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:44:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:44:48,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:44:48,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:44:48,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:44:48 BoogieIcfgContainer [2021-05-02 23:44:48,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:44:48,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:44:48,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:44:48,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:44:48,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:44:47" (1/3) ... [2021-05-02 23:44:48,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ace364a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:44:48, skipping insertion in model container [2021-05-02 23:44:48,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:44:47" (2/3) ... [2021-05-02 23:44:48,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ace364a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:44:48, skipping insertion in model container [2021-05-02 23:44:48,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:44:48" (3/3) ... [2021-05-02 23:44:48,226 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2021-05-02 23:44:48,231 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:44:48,252 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:44:48,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:44:48,280 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:44:48,281 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:44:48,281 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:44:48,281 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:44:48,281 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:44:48,281 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:44:48,281 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:44:48,281 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:44:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 23:44:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:44:48,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:48,307 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:48,308 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 1 times [2021-05-02 23:44:48,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:48,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955742121] [2021-05-02 23:44:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:48,392 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:44:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:48,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:48,618 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:48,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955742121] [2021-05-02 23:44:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [955742121] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:48,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:48,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:44:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246168524] [2021-05-02 23:44:48,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:44:48,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:44:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:44:48,637 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 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 23:44:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:48,796 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 23:44:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:44:48,798 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 23:44:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:48,804 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:44:48,805 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:44:48,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:44:48,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:44:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 23:44:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:44:48,848 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 23:44:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:48,849 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:44:48,850 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 23:44:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:44:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:44:48,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:48,851 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:48,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:44:48,852 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1786070446, now seen corresponding path program 1 times [2021-05-02 23:44:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437483199] [2021-05-02 23:44:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:48,899 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_11 1000000) InVars {main_~i~0=v_main_~i~0_11} OutVars{main_~i~0=v_main_~i~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:44:48,916 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:48,941 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,968 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:48,994 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:49,023 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:49,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437483199] [2021-05-02 23:44:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437483199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:49,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:49,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:44:49,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729244705] [2021-05-02 23:44:49,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:44:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:49,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:44:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:44:49,241 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:49,395 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:44:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:44:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:44:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:49,397 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:44:49,397 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:44:49,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:44:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:44:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-02 23:44:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:44:49,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-05-02 23:44:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:49,407 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:44:49,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:44:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:44:49,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:49,408 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:49,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:44:49,408 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash -471224436, now seen corresponding path program 2 times [2021-05-02 23:44:49,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:49,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969889750] [2021-05-02 23:44:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:49,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_15 1000000) InVars {main_~i~0=v_main_~i~0_15} OutVars{main_~i~0=v_main_~i~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:44:49,424 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:49,426 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:49,434 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:49,456 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:49,469 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:49,473 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_17 999999) InVars {main_~i~0=v_main_~i~0_17} OutVars{main_~i~0=v_main_~i~0_17} AuxVars[] AssignedVars[] [2021-05-02 23:44:49,477 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:49,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:49,511 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:49,524 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:49,537 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:49,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:49,711 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:49,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969889750] [2021-05-02 23:44:49,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [969889750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:49,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:49,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:44:49,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970138079] [2021-05-02 23:44:49,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:44:49,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:44:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:44:49,715 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:49,867 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:44:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:44:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:44:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:49,869 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:44:49,869 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:44:49,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:44:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:44:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 23:44:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:44:49,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-05-02 23:44:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:49,874 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:44:49,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:44:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:44:49,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:49,875 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:49,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:44:49,875 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:49,876 INFO L82 PathProgramCache]: Analyzing trace with hash -773121558, now seen corresponding path program 3 times [2021-05-02 23:44:49,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:49,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852386902] [2021-05-02 23:44:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:49,891 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_22 1000000) InVars {main_~i~0=v_main_~i~0_22} OutVars{main_~i~0=v_main_~i~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:44:49,895 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:49,909 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:49,919 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:49,941 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:49,953 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:49,956 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_24 999999) InVars {main_~i~0=v_main_~i~0_24} OutVars{main_~i~0=v_main_~i~0_24} AuxVars[] AssignedVars[] [2021-05-02 23:44:49,960 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:49,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:49,981 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:49,991 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:50,007 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:50,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:50,153 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:50,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852386902] [2021-05-02 23:44:50,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [852386902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:50,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:50,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:44:50,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041260264] [2021-05-02 23:44:50,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:44:50,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:50,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:44:50,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:44:50,155 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:50,309 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:44:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:44:50,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:44:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:50,312 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:44:50,312 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:44:50,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:44:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:44:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 23:44:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-02 23:44:50,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-05-02 23:44:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:50,323 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-02 23:44:50,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-02 23:44:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:44:50,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:50,324 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:50,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:44:50,325 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1161520328, now seen corresponding path program 4 times [2021-05-02 23:44:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:50,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533153280] [2021-05-02 23:44:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:50,332 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_30 1000000) InVars {main_~i~0=v_main_~i~0_30} OutVars{main_~i~0=v_main_~i~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:44:50,339 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:50,360 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:50,377 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:50,397 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:50,409 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:50,412 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_32 999999) InVars {main_~i~0=v_main_~i~0_32} OutVars{main_~i~0=v_main_~i~0_32} AuxVars[] AssignedVars[] [2021-05-02 23:44:50,415 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:50,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:50,423 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:50,438 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:50,449 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:50,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:50,624 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:50,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533153280] [2021-05-02 23:44:50,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [533153280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:50,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:50,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:44:50,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705510139] [2021-05-02 23:44:50,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:44:50,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:44:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:44:50,630 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:50,851 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:44:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:44:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:44:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:50,853 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:44:50,853 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:44:50,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:44:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:44:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 23:44:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 23:44:50,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-05-02 23:44:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:50,858 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 23:44:50,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 23:44:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:44:50,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:50,859 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:50,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:44:50,859 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash 631533606, now seen corresponding path program 5 times [2021-05-02 23:44:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:50,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93861640] [2021-05-02 23:44:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:50,865 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_39 1000000) InVars {main_~i~0=v_main_~i~0_39} OutVars{main_~i~0=v_main_~i~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:44:50,868 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:50,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:50,882 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:50,892 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:50,902 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:50,909 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_41 999999) InVars {main_~i~0=v_main_~i~0_41} OutVars{main_~i~0=v_main_~i~0_41} AuxVars[] AssignedVars[] [2021-05-02 23:44:50,914 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:50,922 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:50,927 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:50,935 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:50,945 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:50,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:51,095 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93861640] [2021-05-02 23:44:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [93861640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:51,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:51,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:44:51,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475870829] [2021-05-02 23:44:51,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:44:51,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:51,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:44:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:44:51,101 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:51,299 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:44:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:44:51,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:44:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:51,301 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:44:51,301 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:44:51,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:44:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:44:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 23:44:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 23:44:51,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2021-05-02 23:44:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:51,307 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 23:44:51,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 23:44:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:44:51,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:51,307 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:51,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:44:51,308 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1879565308, now seen corresponding path program 6 times [2021-05-02 23:44:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:51,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423519523] [2021-05-02 23:44:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:51,318 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_49 1000000) InVars {main_~i~0=v_main_~i~0_49} OutVars{main_~i~0=v_main_~i~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:44:51,320 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:51,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:51,334 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:51,341 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:51,350 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:51,352 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_51 999999) InVars {main_~i~0=v_main_~i~0_51} OutVars{main_~i~0=v_main_~i~0_51} AuxVars[] AssignedVars[] [2021-05-02 23:44:51,354 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:51,362 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:51,374 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:51,383 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:51,393 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:51,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:51,555 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:51,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423519523] [2021-05-02 23:44:51,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423519523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:51,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:51,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:44:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841325851] [2021-05-02 23:44:51,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:44:51,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:44:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:44:51,557 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:51,812 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:44:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:44:51,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:44:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:51,813 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:44:51,813 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:44:51,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:44:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:44:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 23:44:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-02 23:44:51,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-05-02 23:44:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:51,819 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-02 23:44:51,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-02 23:44:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:44:51,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:51,820 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:51,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:44:51,820 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1274001310, now seen corresponding path program 7 times [2021-05-02 23:44:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077358461] [2021-05-02 23:44:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:51,827 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_60 1000000) InVars {main_~i~0=v_main_~i~0_60} OutVars{main_~i~0=v_main_~i~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:44:51,830 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:51,839 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:51,847 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:51,857 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:51,867 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:51,871 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_62 999999) InVars {main_~i~0=v_main_~i~0_62} OutVars{main_~i~0=v_main_~i~0_62} AuxVars[] AssignedVars[] [2021-05-02 23:44:51,873 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:51,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:51,883 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:51,904 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:51,914 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:51,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:52,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:52,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077358461] [2021-05-02 23:44:52,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077358461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:52,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:52,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:44:52,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370918] [2021-05-02 23:44:52,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:44:52,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:44:52,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:44:52,104 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:52,460 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:44:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:44:52,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:44:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:52,461 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:44:52,461 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:44:52,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:44:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:44:52,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 23:44:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 23:44:52,468 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2021-05-02 23:44:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:52,468 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 23:44:52,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 23:44:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:44:52,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:52,469 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:52,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:44:52,469 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 852415808, now seen corresponding path program 8 times [2021-05-02 23:44:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:52,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067138997] [2021-05-02 23:44:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:52,481 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_72 1000000) InVars {main_~i~0=v_main_~i~0_72} OutVars{main_~i~0=v_main_~i~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:44:52,483 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:52,494 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:52,503 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:52,520 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:52,530 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:52,532 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_74 999999) InVars {main_~i~0=v_main_~i~0_74} OutVars{main_~i~0=v_main_~i~0_74} AuxVars[] AssignedVars[] [2021-05-02 23:44:52,538 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:52,540 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:52,545 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:52,560 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:52,571 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:52,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:52,653 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 23:44:52,776 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067138997] [2021-05-02 23:44:52,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067138997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:52,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:52,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:44:52,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725654589] [2021-05-02 23:44:52,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:44:52,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:44:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:44:52,778 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:53,144 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:44:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:44:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:44:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:53,145 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:44:53,145 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:44:53,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:44:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:44:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 23:44:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 23:44:53,151 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2021-05-02 23:44:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:53,151 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 23:44:53,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 23:44:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:44:53,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:53,152 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:53,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:44:53,152 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -65166690, now seen corresponding path program 9 times [2021-05-02 23:44:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:53,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732210048] [2021-05-02 23:44:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:53,157 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_85 1000000) InVars {main_~i~0=v_main_~i~0_85} OutVars{main_~i~0=v_main_~i~0_85} AuxVars[] AssignedVars[] [2021-05-02 23:44:53,160 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:53,168 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:53,173 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:53,194 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:53,205 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:53,209 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_87 999999) InVars {main_~i~0=v_main_~i~0_87} OutVars{main_~i~0=v_main_~i~0_87} AuxVars[] AssignedVars[] [2021-05-02 23:44:53,211 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:53,213 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:53,222 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:53,240 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:53,251 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:53,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:53,542 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:53,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732210048] [2021-05-02 23:44:53,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [732210048] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:53,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:53,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:44:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960232596] [2021-05-02 23:44:53,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:44:53,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:44:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:44:53,544 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:53,922 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:44:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:44:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:44:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:53,923 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:44:53,924 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:44:53,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:44:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:44:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 23:44:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-02 23:44:53,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2021-05-02 23:44:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:53,930 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-02 23:44:53,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-02 23:44:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:44:53,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:53,931 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:53,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:44:53,931 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1393651588, now seen corresponding path program 10 times [2021-05-02 23:44:53,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:53,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346511448] [2021-05-02 23:44:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:53,936 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_99 1000000) InVars {main_~i~0=v_main_~i~0_99} OutVars{main_~i~0=v_main_~i~0_99} AuxVars[] AssignedVars[] [2021-05-02 23:44:53,941 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:53,944 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:53,952 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:53,969 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:53,980 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:53,983 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_101 999999) InVars {main_~i~0=v_main_~i~0_101} OutVars{main_~i~0=v_main_~i~0_101} AuxVars[] AssignedVars[] [2021-05-02 23:44:53,985 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:53,987 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:53,993 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:54,008 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:54,019 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:54,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:54,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:54,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346511448] [2021-05-02 23:44:54,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346511448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:54,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:54,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:44:54,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787335669] [2021-05-02 23:44:54,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:44:54,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:44:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:44:54,244 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:54,640 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:44:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:44:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:44:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:54,645 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:44:54,646 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:44:54,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:44:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:44:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 23:44:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-02 23:44:54,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2021-05-02 23:44:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:54,667 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-02 23:44:54,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-02 23:44:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:44:54,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:54,668 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:54,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:44:54,668 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1832615642, now seen corresponding path program 11 times [2021-05-02 23:44:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:54,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852768497] [2021-05-02 23:44:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:54,677 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_114 1000000) InVars {main_~i~0=v_main_~i~0_114} OutVars{main_~i~0=v_main_~i~0_114} AuxVars[] AssignedVars[] [2021-05-02 23:44:54,680 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:54,681 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,686 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:54,701 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:54,711 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:54,717 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_116 999999) InVars {main_~i~0=v_main_~i~0_116} OutVars{main_~i~0=v_main_~i~0_116} AuxVars[] AssignedVars[] [2021-05-02 23:44:54,721 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:54,729 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,736 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:54,744 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:54,754 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:54,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:54,996 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852768497] [2021-05-02 23:44:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [852768497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:54,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:54,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:44:54,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39788506] [2021-05-02 23:44:54,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:44:54,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:44:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:44:54,999 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:55,496 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:44:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:44:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:44:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:55,500 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:44:55,500 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:44:55,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:44:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:44:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-02 23:44:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-02 23:44:55,512 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2021-05-02 23:44:55,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:55,514 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-02 23:44:55,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-02 23:44:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:44:55,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:55,518 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:55,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:44:55,518 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1309035960, now seen corresponding path program 12 times [2021-05-02 23:44:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:55,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224371999] [2021-05-02 23:44:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:55,530 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_130 1000000) InVars {main_~i~0=v_main_~i~0_130} OutVars{main_~i~0=v_main_~i~0_130} AuxVars[] AssignedVars[] [2021-05-02 23:44:55,534 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:55,541 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:55,548 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:55,565 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:55,578 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:55,581 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_132 999999) InVars {main_~i~0=v_main_~i~0_132} OutVars{main_~i~0=v_main_~i~0_132} AuxVars[] AssignedVars[] [2021-05-02 23:44:55,584 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:55,585 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:55,592 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:55,608 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:55,618 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:55,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:55,930 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:55,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224371999] [2021-05-02 23:44:55,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224371999] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:55,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:55,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:44:55,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193279834] [2021-05-02 23:44:55,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:44:55,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:44:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:44:55,932 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 23:44:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:56,467 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:44:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:44:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 23:44:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:56,470 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:44:56,470 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:44:56,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:44:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:44:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 23:44:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-02 23:44:56,482 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2021-05-02 23:44:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:56,485 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-02 23:44:56,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 23:44:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-02 23:44:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:44:56,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:56,487 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:56,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:44:56,488 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash 660135190, now seen corresponding path program 13 times [2021-05-02 23:44:56,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:56,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102276214] [2021-05-02 23:44:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:56,494 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_147 1000000) InVars {main_~i~0=v_main_~i~0_147} OutVars{main_~i~0=v_main_~i~0_147} AuxVars[] AssignedVars[] [2021-05-02 23:44:56,496 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:56,497 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:56,504 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:56,519 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:56,529 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:56,531 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_149 999999) InVars {main_~i~0=v_main_~i~0_149} OutVars{main_~i~0=v_main_~i~0_149} AuxVars[] AssignedVars[] [2021-05-02 23:44:56,533 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:56,533 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:56,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:56,554 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:56,564 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:56,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:56,823 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:56,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102276214] [2021-05-02 23:44:56,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [102276214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:56,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:56,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:44:56,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974771012] [2021-05-02 23:44:56,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:44:56,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:44:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:44:56,826 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23:44:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:57,481 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:44:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:44:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23:44:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:57,482 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:44:57,482 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:44:57,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:44:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:44:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 23:44:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-02 23:44:57,489 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2021-05-02 23:44:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:57,489 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-02 23:44:57,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23:44:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-02 23:44:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:44:57,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:57,490 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:57,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:44:57,490 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash -163246860, now seen corresponding path program 14 times [2021-05-02 23:44:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:57,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247072758] [2021-05-02 23:44:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:57,496 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_165 1000000) InVars {main_~i~0=v_main_~i~0_165} OutVars{main_~i~0=v_main_~i~0_165} AuxVars[] AssignedVars[] [2021-05-02 23:44:57,502 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:57,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:57,509 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:57,532 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:57,542 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:57,545 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_167 999999) InVars {main_~i~0=v_main_~i~0_167} OutVars{main_~i~0=v_main_~i~0_167} AuxVars[] AssignedVars[] [2021-05-02 23:44:57,547 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:57,556 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:57,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:57,573 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:57,585 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:57,874 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:57,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247072758] [2021-05-02 23:44:57,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [247072758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:57,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:57,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:44:57,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463360678] [2021-05-02 23:44:57,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:44:57,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:57,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:44:57,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:44:57,876 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 23:44:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:58,502 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:44:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:44:58,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 23:44:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:58,503 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:44:58,503 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:44:58,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:44:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:44:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 23:44:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-02 23:44:58,511 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2021-05-02 23:44:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:58,511 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-02 23:44:58,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 23:44:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-02 23:44:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:44:58,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:58,512 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:58,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:44:58,512 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1159414446, now seen corresponding path program 15 times [2021-05-02 23:44:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264163116] [2021-05-02 23:44:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:58,522 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_184 1000000) InVars {main_~i~0=v_main_~i~0_184} OutVars{main_~i~0=v_main_~i~0_184} AuxVars[] AssignedVars[] [2021-05-02 23:44:58,524 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:58,533 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:58,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:58,546 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:58,555 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:58,558 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_186 999999) InVars {main_~i~0=v_main_~i~0_186} OutVars{main_~i~0=v_main_~i~0_186} AuxVars[] AssignedVars[] [2021-05-02 23:44:58,560 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:58,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:58,567 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:58,582 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:58,592 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:58,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:58,940 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:58,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264163116] [2021-05-02 23:44:58,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [264163116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:58,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:58,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:44:58,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000804844] [2021-05-02 23:44:58,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:44:58,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:58,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:44:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:44:58,943 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 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 23:44:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:59,643 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:44:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:44:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 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 23:44:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:59,645 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:44:59,645 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:44:59,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:44:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:44:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-05-02 23:44:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-02 23:44:59,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2021-05-02 23:44:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:59,656 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-02 23:44:59,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 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 23:44:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-02 23:44:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:44:59,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:59,658 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:59,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:44:59,659 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:59,660 INFO L82 PathProgramCache]: Analyzing trace with hash -698757584, now seen corresponding path program 16 times [2021-05-02 23:44:59,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:59,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971303993] [2021-05-02 23:44:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:59,665 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_204 1000000) InVars {main_~i~0=v_main_~i~0_204} OutVars{main_~i~0=v_main_~i~0_204} AuxVars[] AssignedVars[] [2021-05-02 23:44:59,667 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:59,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:59,677 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:59,694 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:59,704 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:59,705 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_206 999999) InVars {main_~i~0=v_main_~i~0_206} OutVars{main_~i~0=v_main_~i~0_206} AuxVars[] AssignedVars[] [2021-05-02 23:44:59,706 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:44:59,714 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:59,720 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:59,726 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:44:59,736 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:59,798 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 23:45:00,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:00,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971303993] [2021-05-02 23:45:00,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971303993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:00,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:00,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:45:00,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52028841] [2021-05-02 23:45:00,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:45:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:45:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:45:00,098 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 23:45:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:00,814 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:45:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:45:00,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 23:45:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:00,815 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:45:00,815 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:45:00,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:45:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:45:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 23:45:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-02 23:45:00,825 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2021-05-02 23:45:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:00,825 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-02 23:45:00,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 23:45:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-02 23:45:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:45:00,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:00,827 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:00,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:45:00,827 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:00,828 INFO L82 PathProgramCache]: Analyzing trace with hash -389144690, now seen corresponding path program 17 times [2021-05-02 23:45:00,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:00,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635475533] [2021-05-02 23:45:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:00,834 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_225 1000000) InVars {main_~i~0=v_main_~i~0_225} OutVars{main_~i~0=v_main_~i~0_225} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,837 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:00,837 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:00,860 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:00,870 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:00,872 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_227 999999) InVars {main_~i~0=v_main_~i~0_227} OutVars{main_~i~0=v_main_~i~0_227} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,873 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:00,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,880 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:00,903 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:00,913 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:00,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:01,268 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:01,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635475533] [2021-05-02 23:45:01,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [635475533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:01,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:01,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:45:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839890990] [2021-05-02 23:45:01,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:45:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:45:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:45:01,270 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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 23:45:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:02,171 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:45:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:45:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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 23:45:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:02,172 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:45:02,172 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:45:02,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:45:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:45:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-05-02 23:45:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-02 23:45:02,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2021-05-02 23:45:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:02,180 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-02 23:45:02,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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 23:45:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-02 23:45:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:45:02,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:02,181 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:02,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:45:02,181 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:02,182 INFO L82 PathProgramCache]: Analyzing trace with hash 796103020, now seen corresponding path program 18 times [2021-05-02 23:45:02,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:02,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964843968] [2021-05-02 23:45:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:02,189 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_247 1000000) InVars {main_~i~0=v_main_~i~0_247} OutVars{main_~i~0=v_main_~i~0_247} AuxVars[] AssignedVars[] [2021-05-02 23:45:02,191 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:02,191 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:02,197 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:02,210 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:02,232 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:02,242 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_249 999999) InVars {main_~i~0=v_main_~i~0_249} OutVars{main_~i~0=v_main_~i~0_249} AuxVars[] AssignedVars[] [2021-05-02 23:45:02,243 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:02,244 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:02,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:02,278 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:02,289 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:02,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:02,723 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964843968] [2021-05-02 23:45:02,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [964843968] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:02,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:02,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:45:02,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670032224] [2021-05-02 23:45:02,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:45:02,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:45:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:45:02,735 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 24 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 23:45:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:03,715 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:45:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:45:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 24 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 23:45:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:03,717 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:45:03,717 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:45:03,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:45:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:45:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 23:45:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-02 23:45:03,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2021-05-02 23:45:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:03,729 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-02 23:45:03,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 24 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 23:45:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-02 23:45:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:45:03,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:03,730 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:03,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:45:03,731 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1652818890, now seen corresponding path program 19 times [2021-05-02 23:45:03,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:03,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628764205] [2021-05-02 23:45:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:03,750 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_270 1000000) InVars {main_~i~0=v_main_~i~0_270} OutVars{main_~i~0=v_main_~i~0_270} AuxVars[] AssignedVars[] [2021-05-02 23:45:03,752 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:03,760 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:03,765 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:03,773 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:03,784 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:03,794 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_272 999999) InVars {main_~i~0=v_main_~i~0_272} OutVars{main_~i~0=v_main_~i~0_272} AuxVars[] AssignedVars[] [2021-05-02 23:45:03,796 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:03,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:03,811 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:03,819 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:03,830 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:03,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:04,375 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628764205] [2021-05-02 23:45:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628764205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:04,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:04,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:45:04,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288462426] [2021-05-02 23:45:04,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:45:04,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:45:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:45:04,377 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 23:45:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:05,390 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:45:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:45:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 23:45:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:05,391 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:45:05,391 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:45:05,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 986.8ms TimeCoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:45:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:45:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-02 23:45:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-02 23:45:05,404 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2021-05-02 23:45:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:05,404 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-02 23:45:05,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 23:45:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-02 23:45:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:45:05,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:05,406 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:05,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:45:05,407 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash 323049128, now seen corresponding path program 20 times [2021-05-02 23:45:05,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:05,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895032832] [2021-05-02 23:45:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:05,418 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_294 1000000) InVars {main_~i~0=v_main_~i~0_294} OutVars{main_~i~0=v_main_~i~0_294} AuxVars[] AssignedVars[] [2021-05-02 23:45:05,427 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:05,435 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:05,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:05,449 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:05,459 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:05,461 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_296 999999) InVars {main_~i~0=v_main_~i~0_296} OutVars{main_~i~0=v_main_~i~0_296} AuxVars[] AssignedVars[] [2021-05-02 23:45:05,481 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:05,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:05,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:05,518 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:05,528 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:05,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:06,090 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895032832] [2021-05-02 23:45:06,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895032832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:06,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:06,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:45:06,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571853907] [2021-05-02 23:45:06,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:45:06,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:45:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:45:06,092 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 23:45:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:07,263 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:45:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:45:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 23:45:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:07,264 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:45:07,264 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:45:07,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 981.9ms TimeCoverageRelationStatistics Valid=186, Invalid=2264, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:45:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:45:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 23:45:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-02 23:45:07,273 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2021-05-02 23:45:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:07,273 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-02 23:45:07,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 23:45:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-02 23:45:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:45:07,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:07,274 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:07,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:45:07,274 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1980405242, now seen corresponding path program 21 times [2021-05-02 23:45:07,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:07,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556742656] [2021-05-02 23:45:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:07,279 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_319 1000000) InVars {main_~i~0=v_main_~i~0_319} OutVars{main_~i~0=v_main_~i~0_319} AuxVars[] AssignedVars[] [2021-05-02 23:45:07,281 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:07,289 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:07,294 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:07,301 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:07,316 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:07,322 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_321 999999) InVars {main_~i~0=v_main_~i~0_321} OutVars{main_~i~0=v_main_~i~0_321} AuxVars[] AssignedVars[] [2021-05-02 23:45:07,323 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:07,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:07,329 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:07,344 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:07,355 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:07,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:07,845 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:07,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556742656] [2021-05-02 23:45:07,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [556742656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:07,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:07,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:45:07,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100885791] [2021-05-02 23:45:07,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:45:07,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:45:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:45:07,847 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 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 23:45:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:08,959 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:45:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:45:08,962 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 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 23:45:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:08,963 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:45:08,963 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:45:08,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 981.8ms TimeCoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:45:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:45:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-02 23:45:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-02 23:45:08,972 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2021-05-02 23:45:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:08,972 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-02 23:45:08,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 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 23:45:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-02 23:45:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:45:08,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:08,973 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:08,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:45:08,973 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash 603069924, now seen corresponding path program 22 times [2021-05-02 23:45:08,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:08,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696392940] [2021-05-02 23:45:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:08,981 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_345 1000000) InVars {main_~i~0=v_main_~i~0_345} OutVars{main_~i~0=v_main_~i~0_345} AuxVars[] AssignedVars[] [2021-05-02 23:45:08,983 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:08,993 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:08,998 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:09,006 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:09,016 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:09,030 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_347 999999) InVars {main_~i~0=v_main_~i~0_347} OutVars{main_~i~0=v_main_~i~0_347} AuxVars[] AssignedVars[] [2021-05-02 23:45:09,031 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:09,032 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:09,039 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:09,054 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:09,064 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:09,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:09,514 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:09,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696392940] [2021-05-02 23:45:09,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696392940] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:09,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:09,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:45:09,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198272107] [2021-05-02 23:45:09,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:45:09,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:09,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:45:09,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:45:09,516 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 23:45:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:10,751 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 23:45:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:45:10,751 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 23:45:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:10,752 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:45:10,752 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:45:10,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1020.9ms TimeCoverageRelationStatistics Valid=202, Invalid=2660, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:45:10,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:45:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-02 23:45:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-02 23:45:10,761 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2021-05-02 23:45:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:10,761 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-02 23:45:10,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 23:45:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-02 23:45:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:45:10,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:10,762 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:10,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:45:10,762 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash 831607362, now seen corresponding path program 23 times [2021-05-02 23:45:10,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:10,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452049925] [2021-05-02 23:45:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:10,770 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_372 1000000) InVars {main_~i~0=v_main_~i~0_372} OutVars{main_~i~0=v_main_~i~0_372} AuxVars[] AssignedVars[] [2021-05-02 23:45:10,772 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:10,772 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:10,778 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:10,792 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:10,802 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:10,803 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_374 999999) InVars {main_~i~0=v_main_~i~0_374} OutVars{main_~i~0=v_main_~i~0_374} AuxVars[] AssignedVars[] [2021-05-02 23:45:10,804 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:10,812 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:10,818 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:10,825 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:10,835 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:10,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:11,451 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:11,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452049925] [2021-05-02 23:45:11,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [452049925] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:11,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:11,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:45:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698000905] [2021-05-02 23:45:11,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:45:11,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:11,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:45:11,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:45:11,453 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 23:45:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:12,758 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 23:45:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:45:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 23:45:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:12,759 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:45:12,759 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:45:12,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1215.6ms TimeCoverageRelationStatistics Valid=210, Invalid=2870, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:45:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:45:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 23:45:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-02 23:45:12,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2021-05-02 23:45:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:12,772 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-02 23:45:12,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 23:45:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-02 23:45:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:45:12,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:12,773 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:12,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:45:12,773 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1412753184, now seen corresponding path program 24 times [2021-05-02 23:45:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:12,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254215150] [2021-05-02 23:45:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:12,779 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_400 1000000) InVars {main_~i~0=v_main_~i~0_400} OutVars{main_~i~0=v_main_~i~0_400} AuxVars[] AssignedVars[] [2021-05-02 23:45:12,780 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:12,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:12,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:12,811 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:12,820 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:12,822 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_402 999999) InVars {main_~i~0=v_main_~i~0_402} OutVars{main_~i~0=v_main_~i~0_402} AuxVars[] AssignedVars[] [2021-05-02 23:45:12,823 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:12,824 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:12,830 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:12,847 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:12,856 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:12,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:13,463 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:13,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254215150] [2021-05-02 23:45:13,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [254215150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:13,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:13,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:45:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231503505] [2021-05-02 23:45:13,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:45:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:45:13,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:45:13,465 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 23:45:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:14,834 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 23:45:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:45:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 23:45:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:14,836 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:45:14,836 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:45:14,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1152.6ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:45:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:45:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-02 23:45:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-02 23:45:14,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2021-05-02 23:45:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:14,846 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-02 23:45:14,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 23:45:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-02 23:45:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:45:14,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:14,846 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:14,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:45:14,846 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1548139646, now seen corresponding path program 25 times [2021-05-02 23:45:14,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:14,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950403416] [2021-05-02 23:45:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:14,877 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_429 1000000) InVars {main_~i~0=v_main_~i~0_429} OutVars{main_~i~0=v_main_~i~0_429} AuxVars[] AssignedVars[] [2021-05-02 23:45:14,879 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:14,888 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:14,897 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:14,906 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:14,917 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:14,919 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_431 999999) InVars {main_~i~0=v_main_~i~0_431} OutVars{main_~i~0=v_main_~i~0_431} AuxVars[] AssignedVars[] [2021-05-02 23:45:14,920 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:14,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:14,926 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:14,949 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:14,967 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:15,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:15,031 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 23:45:15,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:15,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950403416] [2021-05-02 23:45:15,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950403416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:15,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:15,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:45:15,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490190917] [2021-05-02 23:45:15,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:45:15,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:15,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:45:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:45:15,590 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 31 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 23:45:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:16,964 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 23:45:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:45:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.78125) internal successors, (57), 31 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 23:45:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:16,965 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:45:16,965 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:45:16,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1236.7ms TimeCoverageRelationStatistics Valid=226, Invalid=3314, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:45:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:45:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-05-02 23:45:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-02 23:45:16,975 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2021-05-02 23:45:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:16,975 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-02 23:45:16,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.78125) internal successors, (57), 31 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 23:45:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-02 23:45:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:45:16,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:16,976 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:16,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:45:16,976 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1489456548, now seen corresponding path program 26 times [2021-05-02 23:45:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:16,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512898275] [2021-05-02 23:45:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:16,980 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_459 1000000) InVars {main_~i~0=v_main_~i~0_459} OutVars{main_~i~0=v_main_~i~0_459} AuxVars[] AssignedVars[] [2021-05-02 23:45:16,982 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:16,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:16,994 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:17,001 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:17,012 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:17,014 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_461 999999) InVars {main_~i~0=v_main_~i~0_461} OutVars{main_~i~0=v_main_~i~0_461} AuxVars[] AssignedVars[] [2021-05-02 23:45:17,015 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:17,016 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:17,021 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:17,035 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:17,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:17,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:17,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:17,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512898275] [2021-05-02 23:45:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [512898275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:17,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:17,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:45:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918332245] [2021-05-02 23:45:17,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:45:17,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:17,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:45:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:45:17,629 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:19,067 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 23:45:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:45:19,067 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 23:45:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:19,068 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:45:19,068 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:45:19,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1219.9ms TimeCoverageRelationStatistics Valid=234, Invalid=3548, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:45:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:45:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-05-02 23:45:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 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 23:45:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-02 23:45:19,079 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2021-05-02 23:45:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:19,079 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-02 23:45:19,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-02 23:45:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:45:19,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:19,080 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:19,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:45:19,080 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash -41637702, now seen corresponding path program 27 times [2021-05-02 23:45:19,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:19,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869033069] [2021-05-02 23:45:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:19,084 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_490 1000000) InVars {main_~i~0=v_main_~i~0_490} OutVars{main_~i~0=v_main_~i~0_490} AuxVars[] AssignedVars[] [2021-05-02 23:45:19,086 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:19,086 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:19,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:19,106 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:19,122 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:19,124 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_492 999999) InVars {main_~i~0=v_main_~i~0_492} OutVars{main_~i~0=v_main_~i~0_492} AuxVars[] AssignedVars[] [2021-05-02 23:45:19,133 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:19,143 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:19,149 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:19,159 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:19,169 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:19,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:19,939 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:19,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869033069] [2021-05-02 23:45:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [869033069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:19,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:19,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:45:19,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261754392] [2021-05-02 23:45:19,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:45:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:19,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:45:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:45:19,941 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 23:45:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:21,504 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 23:45:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:45:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 23:45:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:21,506 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:45:21,506 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:45:21,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3790, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:45:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:45:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 23:45:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 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 23:45:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-02 23:45:21,515 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2021-05-02 23:45:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:21,516 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-02 23:45:21,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 23:45:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-02 23:45:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:45:21,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:21,517 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:21,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:45:21,517 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash -257130600, now seen corresponding path program 28 times [2021-05-02 23:45:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:21,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72259052] [2021-05-02 23:45:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:21,526 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_522 1000000) InVars {main_~i~0=v_main_~i~0_522} OutVars{main_~i~0=v_main_~i~0_522} AuxVars[] AssignedVars[] [2021-05-02 23:45:21,528 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:21,528 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:21,533 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:21,550 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:21,560 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:21,562 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_524 999999) InVars {main_~i~0=v_main_~i~0_524} OutVars{main_~i~0=v_main_~i~0_524} AuxVars[] AssignedVars[] [2021-05-02 23:45:21,563 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:21,564 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:21,569 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:21,584 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:21,593 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:22,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72259052] [2021-05-02 23:45:22,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [72259052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:22,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:22,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:45:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562296924] [2021-05-02 23:45:22,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:45:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:45:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:45:22,343 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 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 23:45:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:24,132 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 23:45:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:45:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 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 23:45:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:24,133 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:45:24,133 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 23:45:24,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1519.2ms TimeCoverageRelationStatistics Valid=250, Invalid=4040, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:45:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 23:45:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-05-02 23:45:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 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 23:45:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-02 23:45:24,145 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2021-05-02 23:45:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:24,145 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-02 23:45:24,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 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 23:45:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-02 23:45:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:45:24,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:24,146 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:24,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:45:24,146 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:24,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1187375370, now seen corresponding path program 29 times [2021-05-02 23:45:24,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:24,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167973343] [2021-05-02 23:45:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:24,167 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_555 1000000) InVars {main_~i~0=v_main_~i~0_555} OutVars{main_~i~0=v_main_~i~0_555} AuxVars[] AssignedVars[] [2021-05-02 23:45:24,168 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:24,176 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:24,181 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:24,203 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:24,216 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:24,218 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_557 999999) InVars {main_~i~0=v_main_~i~0_557} OutVars{main_~i~0=v_main_~i~0_557} AuxVars[] AssignedVars[] [2021-05-02 23:45:24,219 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:24,227 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:24,232 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:24,246 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:24,268 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:24,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:24,986 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167973343] [2021-05-02 23:45:24,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [167973343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:24,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:24,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:45:24,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650002747] [2021-05-02 23:45:24,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:45:24,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:24,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:45:24,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:45:24,996 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 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 23:45:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:26,833 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 23:45:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:45:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 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 23:45:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:26,835 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:45:26,835 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:45:26,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1550.3ms TimeCoverageRelationStatistics Valid=258, Invalid=4298, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:45:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:45:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-02 23:45:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 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 23:45:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-02 23:45:26,855 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2021-05-02 23:45:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:26,855 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-02 23:45:26,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 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 23:45:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-02 23:45:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:45:26,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:26,856 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:26,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:45:26,857 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1799401772, now seen corresponding path program 30 times [2021-05-02 23:45:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:26,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927528171] [2021-05-02 23:45:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:26,865 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_589 1000000) InVars {main_~i~0=v_main_~i~0_589} OutVars{main_~i~0=v_main_~i~0_589} AuxVars[] AssignedVars[] [2021-05-02 23:45:26,867 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:26,880 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:26,887 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:26,895 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:26,905 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:26,906 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_591 999999) InVars {main_~i~0=v_main_~i~0_591} OutVars{main_~i~0=v_main_~i~0_591} AuxVars[] AssignedVars[] [2021-05-02 23:45:26,913 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:26,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:26,927 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:26,952 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:26,963 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:27,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:27,723 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:27,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927528171] [2021-05-02 23:45:27,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927528171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:27,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:27,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:45:27,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975370404] [2021-05-02 23:45:27,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:45:27,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:45:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:45:27,728 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 23:45:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:29,673 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 23:45:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:45:29,673 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 23:45:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:29,675 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:45:29,675 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:45:29,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1597.5ms TimeCoverageRelationStatistics Valid=266, Invalid=4564, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:45:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:45:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-05-02 23:45:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 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 23:45:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-02 23:45:29,705 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2021-05-02 23:45:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:29,705 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-02 23:45:29,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 23:45:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-02 23:45:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:45:29,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:29,706 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:29,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:45:29,706 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1546254542, now seen corresponding path program 31 times [2021-05-02 23:45:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:29,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238050978] [2021-05-02 23:45:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:29,719 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_624 1000000) InVars {main_~i~0=v_main_~i~0_624} OutVars{main_~i~0=v_main_~i~0_624} AuxVars[] AssignedVars[] [2021-05-02 23:45:29,721 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:29,729 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:29,735 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:29,759 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:29,769 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:29,771 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_626 999999) InVars {main_~i~0=v_main_~i~0_626} OutVars{main_~i~0=v_main_~i~0_626} AuxVars[] AssignedVars[] [2021-05-02 23:45:29,772 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:29,773 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:29,778 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:29,797 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:29,807 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:29,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:30,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238050978] [2021-05-02 23:45:30,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238050978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:30,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:30,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:45:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140642887] [2021-05-02 23:45:30,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:45:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:30,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:45:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:45:30,644 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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 23:45:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:32,567 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 23:45:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:45:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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 23:45:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:32,568 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:45:32,568 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:45:32,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1656.7ms TimeCoverageRelationStatistics Valid=274, Invalid=4838, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:45:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:45:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-05-02 23:45:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 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 23:45:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-02 23:45:32,579 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2021-05-02 23:45:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:32,579 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-02 23:45:32,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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 23:45:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-02 23:45:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:45:32,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:32,580 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:32,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:45:32,580 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1210064912, now seen corresponding path program 32 times [2021-05-02 23:45:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:32,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116205572] [2021-05-02 23:45:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:32,587 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_660 1000000) InVars {main_~i~0=v_main_~i~0_660} OutVars{main_~i~0=v_main_~i~0_660} AuxVars[] AssignedVars[] [2021-05-02 23:45:32,588 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:32,589 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:32,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:32,611 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:32,621 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:32,623 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_662 999999) InVars {main_~i~0=v_main_~i~0_662} OutVars{main_~i~0=v_main_~i~0_662} AuxVars[] AssignedVars[] [2021-05-02 23:45:32,624 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:32,632 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:32,637 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:32,644 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:32,653 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:32,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:33,399 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:33,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116205572] [2021-05-02 23:45:33,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116205572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:33,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:33,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:45:33,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648015200] [2021-05-02 23:45:33,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:45:33,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:45:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:45:33,401 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 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 23:45:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:35,520 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 23:45:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:45:35,520 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 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 23:45:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:35,521 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:45:35,521 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:45:35,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1696.9ms TimeCoverageRelationStatistics Valid=282, Invalid=5120, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:45:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:45:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 23:45:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 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 23:45:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-02 23:45:35,537 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2021-05-02 23:45:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:35,538 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-02 23:45:35,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 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 23:45:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-02 23:45:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:45:35,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:35,538 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:35,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:45:35,538 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash 38238574, now seen corresponding path program 33 times [2021-05-02 23:45:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:35,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775503201] [2021-05-02 23:45:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:35,544 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_697 1000000) InVars {main_~i~0=v_main_~i~0_697} OutVars{main_~i~0=v_main_~i~0_697} AuxVars[] AssignedVars[] [2021-05-02 23:45:35,546 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:35,547 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,554 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:35,592 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:35,604 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:35,609 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_699 999999) InVars {main_~i~0=v_main_~i~0_699} OutVars{main_~i~0=v_main_~i~0_699} AuxVars[] AssignedVars[] [2021-05-02 23:45:35,611 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:35,629 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,637 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:35,644 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:35,658 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:35,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:36,552 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:36,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775503201] [2021-05-02 23:45:36,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [775503201] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:36,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:36,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:45:36,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191931239] [2021-05-02 23:45:36,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:45:36,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:45:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:45:36,554 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 41 states, 40 states have (on average 1.825) internal successors, (73), 39 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 23:45:37,158 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:45:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:39,105 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 23:45:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:45:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 39 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 23:45:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:39,115 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:45:39,115 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:45:39,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2077.4ms TimeCoverageRelationStatistics Valid=290, Invalid=5410, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:45:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:45:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-02 23:45:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 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 23:45:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-02 23:45:39,129 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2021-05-02 23:45:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:39,129 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-02 23:45:39,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 39 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 23:45:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-02 23:45:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:45:39,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:39,130 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:39,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:45:39,130 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -805440692, now seen corresponding path program 34 times [2021-05-02 23:45:39,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:39,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009214641] [2021-05-02 23:45:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:39,136 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_735 1000000) InVars {main_~i~0=v_main_~i~0_735} OutVars{main_~i~0=v_main_~i~0_735} AuxVars[] AssignedVars[] [2021-05-02 23:45:39,139 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:39,140 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:39,146 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:39,161 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:39,172 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:39,174 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_737 999999) InVars {main_~i~0=v_main_~i~0_737} OutVars{main_~i~0=v_main_~i~0_737} AuxVars[] AssignedVars[] [2021-05-02 23:45:39,175 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:39,182 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:39,187 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:39,211 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:39,221 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:39,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:40,192 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:40,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009214641] [2021-05-02 23:45:40,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009214641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:40,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:40,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:45:40,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048011856] [2021-05-02 23:45:40,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:45:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:45:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:45:40,195 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 23:45:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:42,473 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 23:45:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:45:42,473 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 23:45:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:42,474 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:45:42,474 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 23:45:42,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1976.4ms TimeCoverageRelationStatistics Valid=298, Invalid=5708, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:45:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 23:45:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-05-02 23:45:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 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 23:45:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-02 23:45:42,488 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2021-05-02 23:45:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:42,488 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-02 23:45:42,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 23:45:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-02 23:45:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:45:42,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:42,489 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:42,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:45:42,489 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 167603626, now seen corresponding path program 35 times [2021-05-02 23:45:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:42,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706050091] [2021-05-02 23:45:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:42,497 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_774 1000000) InVars {main_~i~0=v_main_~i~0_774} OutVars{main_~i~0=v_main_~i~0_774} AuxVars[] AssignedVars[] [2021-05-02 23:45:42,498 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:42,507 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:42,514 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:42,522 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:42,537 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:42,542 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_776 999999) InVars {main_~i~0=v_main_~i~0_776} OutVars{main_~i~0=v_main_~i~0_776} AuxVars[] AssignedVars[] [2021-05-02 23:45:42,544 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:42,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:42,551 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:42,569 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:42,586 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:42,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:43,563 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706050091] [2021-05-02 23:45:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [706050091] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:43,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:43,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:45:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431132425] [2021-05-02 23:45:43,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:45:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:45:43,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:45:43,565 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 43 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 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 23:45:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:46,016 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 23:45:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:45:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 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 23:45:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:46,018 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:45:46,018 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:45:46,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2108.1ms TimeCoverageRelationStatistics Valid=306, Invalid=6014, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:45:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:45:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-05-02 23:45:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 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 23:45:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-02 23:45:46,034 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2021-05-02 23:45:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:46,034 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-02 23:45:46,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 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 23:45:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-02 23:45:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:45:46,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:46,036 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:46,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:45:46,036 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1039677304, now seen corresponding path program 36 times [2021-05-02 23:45:46,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:46,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326543473] [2021-05-02 23:45:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:46,044 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_814 1000000) InVars {main_~i~0=v_main_~i~0_814} OutVars{main_~i~0=v_main_~i~0_814} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,046 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:46,048 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,053 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:46,068 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:46,079 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:46,081 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_816 999999) InVars {main_~i~0=v_main_~i~0_816} OutVars{main_~i~0=v_main_~i~0_816} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,082 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:46,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,096 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:46,104 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:46,128 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:46,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:47,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326543473] [2021-05-02 23:45:47,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326543473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:47,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:47,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:45:47,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177893657] [2021-05-02 23:45:47,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:45:47,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:45:47,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:45:47,142 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 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 23:45:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:49,737 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 23:45:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:45:49,738 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 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 23:45:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:49,738 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:45:49,739 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:45:49,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 2146.1ms TimeCoverageRelationStatistics Valid=314, Invalid=6328, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:45:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:45:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-05-02 23:45:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 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 23:45:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-02 23:45:49,753 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2021-05-02 23:45:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:49,753 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-02 23:45:49,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 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 23:45:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-02 23:45:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:45:49,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:49,755 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:49,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:45:49,755 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1595481114, now seen corresponding path program 37 times [2021-05-02 23:45:49,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:49,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951910460] [2021-05-02 23:45:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:49,762 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_855 1000000) InVars {main_~i~0=v_main_~i~0_855} OutVars{main_~i~0=v_main_~i~0_855} AuxVars[] AssignedVars[] [2021-05-02 23:45:49,764 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:49,772 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:49,778 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:49,785 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:49,794 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:49,796 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_857 999999) InVars {main_~i~0=v_main_~i~0_857} OutVars{main_~i~0=v_main_~i~0_857} AuxVars[] AssignedVars[] [2021-05-02 23:45:49,797 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:49,798 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:49,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:49,817 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:49,827 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:49,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:50,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:50,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951910460] [2021-05-02 23:45:50,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [951910460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:50,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:45:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558647838] [2021-05-02 23:45:50,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:45:50,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:50,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:45:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:45:50,892 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 45 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 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 23:45:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:53,660 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 23:45:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:45:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 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 23:45:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:53,661 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:45:53,661 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:45:53,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2293.0ms TimeCoverageRelationStatistics Valid=322, Invalid=6650, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:45:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:45:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 23:45:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 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 23:45:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-02 23:45:53,690 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2021-05-02 23:45:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:53,690 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-02 23:45:53,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 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 23:45:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-02 23:45:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:45:53,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:53,704 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:53,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:45:53,704 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1147969476, now seen corresponding path program 38 times [2021-05-02 23:45:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572966041] [2021-05-02 23:45:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:53,710 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_897 1000000) InVars {main_~i~0=v_main_~i~0_897} OutVars{main_~i~0=v_main_~i~0_897} AuxVars[] AssignedVars[] [2021-05-02 23:45:53,711 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:53,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:53,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:53,730 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:53,740 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:53,744 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_899 999999) InVars {main_~i~0=v_main_~i~0_899} OutVars{main_~i~0=v_main_~i~0_899} AuxVars[] AssignedVars[] [2021-05-02 23:45:53,745 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:53,774 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:53,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:53,794 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:53,805 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:54,941 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:54,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572966041] [2021-05-02 23:45:54,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572966041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:54,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:54,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:45:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089367920] [2021-05-02 23:45:54,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:45:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:45:54,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:45:54,943 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 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 23:45:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:57,609 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 23:45:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:45:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 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 23:45:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:57,611 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:45:57,611 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 23:45:57,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2341.8ms TimeCoverageRelationStatistics Valid=330, Invalid=6980, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:45:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 23:45:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-05-02 23:45:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 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 23:45:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-02 23:45:57,626 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2021-05-02 23:45:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:57,627 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-02 23:45:57,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 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 23:45:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-02 23:45:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:45:57,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:57,627 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:57,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:45:57,628 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 494066722, now seen corresponding path program 39 times [2021-05-02 23:45:57,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:57,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940449207] [2021-05-02 23:45:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:57,644 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_940 1000000) InVars {main_~i~0=v_main_~i~0_940} OutVars{main_~i~0=v_main_~i~0_940} AuxVars[] AssignedVars[] [2021-05-02 23:45:57,646 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:57,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,661 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:57,669 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:57,679 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:57,681 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_942 999999) InVars {main_~i~0=v_main_~i~0_942} OutVars{main_~i~0=v_main_~i~0_942} AuxVars[] AssignedVars[] [2021-05-02 23:45:57,683 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:45:57,687 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:57,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:57,709 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:45:57,719 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:57,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:58,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940449207] [2021-05-02 23:45:58,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940449207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:58,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:58,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:45:58,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185162815] [2021-05-02 23:45:58,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:45:58,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:45:58,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:45:58,776 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 47 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 45 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 23:46:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:01,547 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 23:46:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:46:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 45 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 23:46:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:01,548 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:46:01,548 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:46:01,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2328.1ms TimeCoverageRelationStatistics Valid=338, Invalid=7318, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:46:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:46:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 23:46:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 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 23:46:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-02 23:46:01,565 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2021-05-02 23:46:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:01,565 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-02 23:46:01,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 45 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 23:46:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-02 23:46:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:46:01,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:01,566 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:01,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:46:01,566 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash -841254656, now seen corresponding path program 40 times [2021-05-02 23:46:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:01,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067250978] [2021-05-02 23:46:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:01,572 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_984 1000000) InVars {main_~i~0=v_main_~i~0_984} OutVars{main_~i~0=v_main_~i~0_984} AuxVars[] AssignedVars[] [2021-05-02 23:46:01,574 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:01,575 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,580 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:01,595 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:01,605 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:01,606 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_986 999999) InVars {main_~i~0=v_main_~i~0_986} OutVars{main_~i~0=v_main_~i~0_986} AuxVars[] AssignedVars[] [2021-05-02 23:46:01,608 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:01,609 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,615 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:01,631 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:01,642 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:01,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:02,759 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067250978] [2021-05-02 23:46:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067250978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:02,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:02,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:46:02,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529961133] [2021-05-02 23:46:02,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:46:02,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:02,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:46:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:46:02,762 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 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 23:46:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:05,704 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 23:46:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:46:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 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 23:46:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:05,705 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:46:05,705 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 23:46:05,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2382.6ms TimeCoverageRelationStatistics Valid=346, Invalid=7664, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:46:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 23:46:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-05-02 23:46:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 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 23:46:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-02 23:46:05,723 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2021-05-02 23:46:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:05,724 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-02 23:46:05,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 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 23:46:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-02 23:46:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:46:05,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:05,725 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:05,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:46:05,725 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 110122590, now seen corresponding path program 41 times [2021-05-02 23:46:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:05,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694066610] [2021-05-02 23:46:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:05,732 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1029 1000000) InVars {main_~i~0=v_main_~i~0_1029} OutVars{main_~i~0=v_main_~i~0_1029} AuxVars[] AssignedVars[] [2021-05-02 23:46:05,733 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:05,734 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:05,740 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:05,754 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:05,764 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:05,766 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1031 999999) InVars {main_~i~0=v_main_~i~0_1031} OutVars{main_~i~0=v_main_~i~0_1031} AuxVars[] AssignedVars[] [2021-05-02 23:46:05,768 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:05,768 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:05,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:05,793 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:05,817 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:05,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:07,078 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:07,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694066610] [2021-05-02 23:46:07,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [694066610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:07,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:07,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:46:07,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12883259] [2021-05-02 23:46:07,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:46:07,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:07,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:46:07,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:46:07,080 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 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 23:46:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:10,132 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 23:46:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:46:10,133 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 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 23:46:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:10,134 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:46:10,134 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:46:10,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2621.0ms TimeCoverageRelationStatistics Valid=354, Invalid=8018, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:46:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:46:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-02 23:46:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 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 23:46:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-02 23:46:10,150 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2021-05-02 23:46:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:10,150 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-02 23:46:10,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 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 23:46:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-02 23:46:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:46:10,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:10,151 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:10,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:46:10,152 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -444378052, now seen corresponding path program 42 times [2021-05-02 23:46:10,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:10,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693271223] [2021-05-02 23:46:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:10,156 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1075 1000000) InVars {main_~i~0=v_main_~i~0_1075} OutVars{main_~i~0=v_main_~i~0_1075} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,158 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:10,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,170 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:10,177 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:10,187 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:10,188 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1077 999999) InVars {main_~i~0=v_main_~i~0_1077} OutVars{main_~i~0=v_main_~i~0_1077} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,189 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:10,197 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,212 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:10,218 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:10,229 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:10,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:11,454 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:11,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693271223] [2021-05-02 23:46:11,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [693271223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:11,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:11,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:46:11,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50181310] [2021-05-02 23:46:11,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:46:11,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:11,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:46:11,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:46:11,456 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 50 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 48 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 23:46:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:14,477 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 23:46:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:46:14,477 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 48 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 23:46:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:14,478 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:46:14,478 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 23:46:14,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2583.7ms TimeCoverageRelationStatistics Valid=362, Invalid=8380, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:46:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 23:46:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-05-02 23:46:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 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 23:46:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-05-02 23:46:14,496 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2021-05-02 23:46:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:14,496 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-05-02 23:46:14,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 48 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 23:46:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-05-02 23:46:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:46:14,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:14,497 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:14,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:46:14,498 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -743550310, now seen corresponding path program 43 times [2021-05-02 23:46:14,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:14,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087656782] [2021-05-02 23:46:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:14,506 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1122 1000000) InVars {main_~i~0=v_main_~i~0_1122} OutVars{main_~i~0=v_main_~i~0_1122} AuxVars[] AssignedVars[] [2021-05-02 23:46:14,508 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:14,527 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,533 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:14,540 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:14,551 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:14,552 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1124 999999) InVars {main_~i~0=v_main_~i~0_1124} OutVars{main_~i~0=v_main_~i~0_1124} AuxVars[] AssignedVars[] [2021-05-02 23:46:14,553 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:14,563 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,570 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:14,577 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:14,587 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:14,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:15,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087656782] [2021-05-02 23:46:15,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087656782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:15,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:15,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:46:15,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124643668] [2021-05-02 23:46:15,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:46:15,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:15,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:46:15,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:46:15,865 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 51 states, 50 states have (on average 1.86) internal successors, (93), 49 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 23:46:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:19,348 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 23:46:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:46:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.86) internal successors, (93), 49 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 23:46:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:19,349 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:46:19,349 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:46:19,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2843.6ms TimeCoverageRelationStatistics Valid=370, Invalid=8750, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:46:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:46:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-05-02 23:46:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 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 23:46:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-05-02 23:46:19,367 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2021-05-02 23:46:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:19,367 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-05-02 23:46:19,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.86) internal successors, (93), 49 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 23:46:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-05-02 23:46:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:46:19,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:19,368 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:19,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:46:19,368 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -485281416, now seen corresponding path program 44 times [2021-05-02 23:46:19,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:19,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461758058] [2021-05-02 23:46:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:19,388 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1170 1000000) InVars {main_~i~0=v_main_~i~0_1170} OutVars{main_~i~0=v_main_~i~0_1170} AuxVars[] AssignedVars[] [2021-05-02 23:46:19,392 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:19,393 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:19,406 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:19,421 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:19,431 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:19,433 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1172 999999) InVars {main_~i~0=v_main_~i~0_1172} OutVars{main_~i~0=v_main_~i~0_1172} AuxVars[] AssignedVars[] [2021-05-02 23:46:19,434 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:19,435 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:19,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:19,464 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:19,475 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:19,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:20,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461758058] [2021-05-02 23:46:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [461758058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:20,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:20,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:46:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718816481] [2021-05-02 23:46:20,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:46:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:20,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:46:20,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:46:20,845 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 52 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 50 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 23:46:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:24,199 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 23:46:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:46:24,200 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 50 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 23:46:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:24,201 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:46:24,201 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:46:24,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2863.6ms TimeCoverageRelationStatistics Valid=378, Invalid=9128, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:46:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:46:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-05-02 23:46:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 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 23:46:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-02 23:46:24,218 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2021-05-02 23:46:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:24,218 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-02 23:46:24,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 50 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 23:46:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-02 23:46:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:46:24,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:24,219 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:24,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:46:24,219 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1396977450, now seen corresponding path program 45 times [2021-05-02 23:46:24,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:24,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307294008] [2021-05-02 23:46:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:24,228 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1219 1000000) InVars {main_~i~0=v_main_~i~0_1219} OutVars{main_~i~0=v_main_~i~0_1219} AuxVars[] AssignedVars[] [2021-05-02 23:46:24,229 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:24,237 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,242 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:24,249 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:24,259 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:24,261 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1221 999999) InVars {main_~i~0=v_main_~i~0_1221} OutVars{main_~i~0=v_main_~i~0_1221} AuxVars[] AssignedVars[] [2021-05-02 23:46:24,262 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:24,269 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,274 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:24,281 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:24,290 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:24,342 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 23:46:25,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307294008] [2021-05-02 23:46:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307294008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:25,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:25,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:46:25,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113219205] [2021-05-02 23:46:25,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:46:25,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:46:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:46:25,674 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 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 23:46:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:29,318 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 23:46:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:46:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 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 23:46:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:29,319 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:46:29,319 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:46:29,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 3039.7ms TimeCoverageRelationStatistics Valid=386, Invalid=9514, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:46:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:46:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-05-02 23:46:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 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 23:46:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-05-02 23:46:29,347 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2021-05-02 23:46:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:29,347 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-05-02 23:46:29,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 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 23:46:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-05-02 23:46:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:46:29,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:29,348 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:29,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:46:29,348 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:29,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1363537740, now seen corresponding path program 46 times [2021-05-02 23:46:29,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:29,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721302012] [2021-05-02 23:46:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:29,354 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1269 1000000) InVars {main_~i~0=v_main_~i~0_1269} OutVars{main_~i~0=v_main_~i~0_1269} AuxVars[] AssignedVars[] [2021-05-02 23:46:29,355 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:29,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:29,373 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:29,383 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:29,385 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1271 999999) InVars {main_~i~0=v_main_~i~0_1271} OutVars{main_~i~0=v_main_~i~0_1271} AuxVars[] AssignedVars[] [2021-05-02 23:46:29,391 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:29,392 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,397 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:29,415 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:29,426 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:30,862 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:30,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721302012] [2021-05-02 23:46:30,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [721302012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:30,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:30,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:46:30,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914502006] [2021-05-02 23:46:30,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:46:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:46:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:46:30,863 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 54 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 52 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 23:46:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:34,555 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 23:46:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:46:34,555 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 52 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 23:46:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:34,556 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:46:34,556 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:46:34,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 3083.5ms TimeCoverageRelationStatistics Valid=394, Invalid=9908, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:46:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:46:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-05-02 23:46:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 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 23:46:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-05-02 23:46:34,575 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2021-05-02 23:46:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:34,575 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-05-02 23:46:34,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 52 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 23:46:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-05-02 23:46:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:46:34,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:34,576 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:34,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:46:34,576 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash 707252498, now seen corresponding path program 47 times [2021-05-02 23:46:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:34,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746863175] [2021-05-02 23:46:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:34,582 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1320 1000000) InVars {main_~i~0=v_main_~i~0_1320} OutVars{main_~i~0=v_main_~i~0_1320} AuxVars[] AssignedVars[] [2021-05-02 23:46:34,583 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:34,590 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:34,603 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:34,613 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:34,614 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1322 999999) InVars {main_~i~0=v_main_~i~0_1322} OutVars{main_~i~0=v_main_~i~0_1322} AuxVars[] AssignedVars[] [2021-05-02 23:46:34,615 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:34,623 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,628 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:34,635 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:34,645 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:34,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:36,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746863175] [2021-05-02 23:46:36,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746863175] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:36,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:36,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:46:36,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805546191] [2021-05-02 23:46:36,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:46:36,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:36,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:46:36,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:46:36,147 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 55 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 53 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 23:46:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:39,881 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 23:46:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:46:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 53 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 23:46:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:39,883 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:46:39,883 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:46:39,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 3172.0ms TimeCoverageRelationStatistics Valid=402, Invalid=10310, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:46:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:46:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 23:46:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 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 23:46:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2021-05-02 23:46:39,902 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2021-05-02 23:46:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:39,902 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2021-05-02 23:46:39,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 53 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 23:46:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2021-05-02 23:46:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 23:46:39,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:39,903 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:39,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:46:39,903 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2128154128, now seen corresponding path program 48 times [2021-05-02 23:46:39,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:39,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160337921] [2021-05-02 23:46:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:39,907 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1372 1000000) InVars {main_~i~0=v_main_~i~0_1372} OutVars{main_~i~0=v_main_~i~0_1372} AuxVars[] AssignedVars[] [2021-05-02 23:46:39,909 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:39,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:39,927 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:39,933 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:39,944 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:39,945 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1374 999999) InVars {main_~i~0=v_main_~i~0_1374} OutVars{main_~i~0=v_main_~i~0_1374} AuxVars[] AssignedVars[] [2021-05-02 23:46:39,947 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:39,948 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:39,954 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:39,976 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:39,990 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:40,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:41,454 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:41,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160337921] [2021-05-02 23:46:41,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160337921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:41,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:41,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:46:41,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799332478] [2021-05-02 23:46:41,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:46:41,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:46:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:46:41,456 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 54 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 23:46:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:45,315 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 23:46:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:46:45,315 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 54 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 23:46:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:45,316 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:46:45,316 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:46:45,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 3207.8ms TimeCoverageRelationStatistics Valid=410, Invalid=10720, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:46:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:46:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-05-02 23:46:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 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 23:46:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2021-05-02 23:46:45,335 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2021-05-02 23:46:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:45,336 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2021-05-02 23:46:45,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 54 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 23:46:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2021-05-02 23:46:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 23:46:45,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:45,336 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:45,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:46:45,336 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 350311246, now seen corresponding path program 49 times [2021-05-02 23:46:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:45,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141550564] [2021-05-02 23:46:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:45,342 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1425 1000000) InVars {main_~i~0=v_main_~i~0_1425} OutVars{main_~i~0=v_main_~i~0_1425} AuxVars[] AssignedVars[] [2021-05-02 23:46:45,347 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:45,355 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:45,360 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:45,368 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:45,378 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:45,380 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1427 999999) InVars {main_~i~0=v_main_~i~0_1427} OutVars{main_~i~0=v_main_~i~0_1427} AuxVars[] AssignedVars[] [2021-05-02 23:46:45,382 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:45,382 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:45,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:45,401 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:45,411 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:45,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:46,997 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141550564] [2021-05-02 23:46:46,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [141550564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:46,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:46,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:46:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357549520] [2021-05-02 23:46:46,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:46:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:46:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:46:46,999 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 57 states, 56 states have (on average 1.875) internal successors, (105), 55 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 23:46:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:50,989 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 23:46:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:46:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.875) internal successors, (105), 55 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 23:46:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:50,991 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:46:50,991 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 23:46:50,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 3375.4ms TimeCoverageRelationStatistics Valid=418, Invalid=11138, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:46:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 23:46:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-05-02 23:46:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 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 23:46:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2021-05-02 23:46:51,010 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2021-05-02 23:46:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:51,011 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2021-05-02 23:46:51,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.875) internal successors, (105), 55 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 23:46:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2021-05-02 23:46:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 23:46:51,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:51,011 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:51,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:46:51,012 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1551313620, now seen corresponding path program 50 times [2021-05-02 23:46:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:51,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001431296] [2021-05-02 23:46:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:51,017 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1479 1000000) InVars {main_~i~0=v_main_~i~0_1479} OutVars{main_~i~0=v_main_~i~0_1479} AuxVars[] AssignedVars[] [2021-05-02 23:46:51,018 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:51,027 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:51,033 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:51,040 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:51,051 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:51,052 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1481 999999) InVars {main_~i~0=v_main_~i~0_1481} OutVars{main_~i~0=v_main_~i~0_1481} AuxVars[] AssignedVars[] [2021-05-02 23:46:51,054 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:51,054 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:51,059 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:51,075 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:51,086 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:51,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:51,136 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 23:46:52,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001431296] [2021-05-02 23:46:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001431296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:52,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:52,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:46:52,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761066589] [2021-05-02 23:46:52,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:46:52,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:46:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:46:52,775 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 58 states, 57 states have (on average 1.8771929824561404) internal successors, (107), 56 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:56,764 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 23:46:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:46:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.8771929824561404) internal successors, (107), 56 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2021-05-02 23:46:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:56,765 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:46:56,765 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 23:46:56,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3470.9ms TimeCoverageRelationStatistics Valid=426, Invalid=11564, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:46:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 23:46:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-02 23:46:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 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 23:46:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2021-05-02 23:46:56,784 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2021-05-02 23:46:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:56,785 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2021-05-02 23:46:56,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.8771929824561404) internal successors, (107), 56 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2021-05-02 23:46:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:46:56,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:56,785 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:56,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:46:56,785 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash 643258250, now seen corresponding path program 51 times [2021-05-02 23:46:56,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:56,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034281908] [2021-05-02 23:46:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:56,789 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1534 1000000) InVars {main_~i~0=v_main_~i~0_1534} OutVars{main_~i~0=v_main_~i~0_1534} AuxVars[] AssignedVars[] [2021-05-02 23:46:56,790 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:56,791 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:56,795 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:56,806 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:56,816 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:56,817 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1536 999999) InVars {main_~i~0=v_main_~i~0_1536} OutVars{main_~i~0=v_main_~i~0_1536} AuxVars[] AssignedVars[] [2021-05-02 23:46:56,818 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:46:56,824 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:56,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:56,834 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:46:56,844 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:56,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:58,391 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:58,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034281908] [2021-05-02 23:46:58,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034281908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:58,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:58,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:46:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873372504] [2021-05-02 23:46:58,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:46:58,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:46:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:46:58,392 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 59 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 57 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 23:47:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:02,376 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 23:47:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:47:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 57 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 23:47:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:02,377 INFO L225 Difference]: With dead ends: 122 [2021-05-02 23:47:02,377 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:47:02,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 44 SyntacticMatches, 11 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 3305.5ms TimeCoverageRelationStatistics Valid=434, Invalid=11998, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:47:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:47:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 23:47:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 states have internal predecessors, (112), 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 23:47:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2021-05-02 23:47:02,397 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2021-05-02 23:47:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:02,397 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2021-05-02 23:47:02,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 57 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 23:47:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2021-05-02 23:47:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 23:47:02,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:02,397 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:02,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:47:02,397 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 797882984, now seen corresponding path program 52 times [2021-05-02 23:47:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:02,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55828142] [2021-05-02 23:47:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:02,407 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1590 1000000) InVars {main_~i~0=v_main_~i~0_1590} OutVars{main_~i~0=v_main_~i~0_1590} AuxVars[] AssignedVars[] [2021-05-02 23:47:02,408 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:02,408 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:02,412 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:02,423 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:02,431 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:02,432 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1592 999999) InVars {main_~i~0=v_main_~i~0_1592} OutVars{main_~i~0=v_main_~i~0_1592} AuxVars[] AssignedVars[] [2021-05-02 23:47:02,433 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:02,440 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:02,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:02,449 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:02,459 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:02,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:04,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:04,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55828142] [2021-05-02 23:47:04,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [55828142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:04,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:04,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:47:04,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401972220] [2021-05-02 23:47:04,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:47:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:04,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:47:04,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:47:04,123 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 60 states, 59 states have (on average 1.88135593220339) internal successors, (111), 58 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 23:47:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:08,291 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 23:47:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:47:08,292 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.88135593220339) internal successors, (111), 58 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 23:47:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:08,292 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:47:08,292 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:47:08,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 3532.0ms TimeCoverageRelationStatistics Valid=442, Invalid=12440, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:47:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:47:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-05-02 23:47:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.008849557522124) internal successors, (114), 113 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 23:47:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-05-02 23:47:08,311 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2021-05-02 23:47:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:08,312 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-05-02 23:47:08,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.88135593220339) internal successors, (111), 58 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 23:47:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-05-02 23:47:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 23:47:08,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:08,312 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:08,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:47:08,312 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -931603002, now seen corresponding path program 53 times [2021-05-02 23:47:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:08,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787837955] [2021-05-02 23:47:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:08,321 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1647 1000000) InVars {main_~i~0=v_main_~i~0_1647} OutVars{main_~i~0=v_main_~i~0_1647} AuxVars[] AssignedVars[] [2021-05-02 23:47:08,322 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:08,328 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:08,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:08,337 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:08,346 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:08,347 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1649 999999) InVars {main_~i~0=v_main_~i~0_1649} OutVars{main_~i~0=v_main_~i~0_1649} AuxVars[] AssignedVars[] [2021-05-02 23:47:08,348 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:08,348 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:08,352 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:08,362 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:08,371 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:08,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:10,182 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:10,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787837955] [2021-05-02 23:47:10,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787837955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:10,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:10,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:47:10,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343413187] [2021-05-02 23:47:10,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:47:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:47:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:47:10,183 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 59 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 23:47:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:14,419 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 23:47:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:47:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 59 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 23:47:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:14,420 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:47:14,420 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:47:14,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3701.6ms TimeCoverageRelationStatistics Valid=450, Invalid=12890, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:47:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:47:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-05-02 23:47:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 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 23:47:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2021-05-02 23:47:14,441 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2021-05-02 23:47:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:14,441 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2021-05-02 23:47:14,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 59 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 23:47:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2021-05-02 23:47:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 23:47:14,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:14,441 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:14,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:47:14,441 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:14,442 INFO L82 PathProgramCache]: Analyzing trace with hash -815291996, now seen corresponding path program 54 times [2021-05-02 23:47:14,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:14,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757164768] [2021-05-02 23:47:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:14,445 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1705 1000000) InVars {main_~i~0=v_main_~i~0_1705} OutVars{main_~i~0=v_main_~i~0_1705} AuxVars[] AssignedVars[] [2021-05-02 23:47:14,446 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:14,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:14,450 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:14,460 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:14,468 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:14,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1707 999999) InVars {main_~i~0=v_main_~i~0_1707} OutVars{main_~i~0=v_main_~i~0_1707} AuxVars[] AssignedVars[] [2021-05-02 23:47:14,470 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:14,476 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:14,479 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:14,484 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:14,492 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:14,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:16,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:16,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757164768] [2021-05-02 23:47:16,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [757164768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:16,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:16,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:47:16,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62339931] [2021-05-02 23:47:16,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:47:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:47:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:47:16,243 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 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 23:47:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:20,662 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 23:47:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:47:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 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 23:47:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:20,664 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:47:20,664 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 23:47:20,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 3749.0ms TimeCoverageRelationStatistics Valid=458, Invalid=13348, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:47:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 23:47:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-05-02 23:47:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 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 23:47:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2021-05-02 23:47:20,686 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2021-05-02 23:47:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:20,686 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2021-05-02 23:47:20,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 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 23:47:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2021-05-02 23:47:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 23:47:20,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:20,687 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:20,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:47:20,687 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash -709564926, now seen corresponding path program 55 times [2021-05-02 23:47:20,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:20,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575265114] [2021-05-02 23:47:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:20,691 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1764 1000000) InVars {main_~i~0=v_main_~i~0_1764} OutVars{main_~i~0=v_main_~i~0_1764} AuxVars[] AssignedVars[] [2021-05-02 23:47:20,692 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:20,693 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:20,696 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:20,707 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:20,716 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:20,717 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1766 999999) InVars {main_~i~0=v_main_~i~0_1766} OutVars{main_~i~0=v_main_~i~0_1766} AuxVars[] AssignedVars[] [2021-05-02 23:47:20,718 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:20,724 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:20,727 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:20,733 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:20,742 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:20,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:20,780 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 23:47:22,669 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575265114] [2021-05-02 23:47:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [575265114] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:22,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:22,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:47:22,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728201622] [2021-05-02 23:47:22,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:47:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:47:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:47:22,671 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 63 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 61 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 23:47:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:27,343 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 23:47:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:47:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 61 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 23:47:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:27,344 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:47:27,344 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 23:47:27,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 3996.1ms TimeCoverageRelationStatistics Valid=466, Invalid=13814, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:47:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 23:47:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-05-02 23:47:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 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 23:47:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2021-05-02 23:47:27,366 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2021-05-02 23:47:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:27,366 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2021-05-02 23:47:27,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 61 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 23:47:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2021-05-02 23:47:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 23:47:27,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:27,367 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:27,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:47:27,367 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2109901536, now seen corresponding path program 56 times [2021-05-02 23:47:27,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:27,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588461332] [2021-05-02 23:47:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:27,376 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1824 1000000) InVars {main_~i~0=v_main_~i~0_1824} OutVars{main_~i~0=v_main_~i~0_1824} AuxVars[] AssignedVars[] [2021-05-02 23:47:27,377 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:27,384 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:27,388 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:27,394 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:27,403 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:27,404 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1826 999999) InVars {main_~i~0=v_main_~i~0_1826} OutVars{main_~i~0=v_main_~i~0_1826} AuxVars[] AssignedVars[] [2021-05-02 23:47:27,405 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:27,411 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:27,415 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:27,422 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:27,432 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:27,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:29,485 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:29,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588461332] [2021-05-02 23:47:29,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [588461332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:29,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:29,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:47:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512027901] [2021-05-02 23:47:29,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:47:29,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:47:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:47:29,487 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 62 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 23:47:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:34,251 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 23:47:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:47:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 62 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 23:47:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:34,253 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:47:34,253 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 23:47:34,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 4141.8ms TimeCoverageRelationStatistics Valid=474, Invalid=14288, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:47:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 23:47:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-05-02 23:47:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 121 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 23:47:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2021-05-02 23:47:34,276 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2021-05-02 23:47:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:34,276 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2021-05-02 23:47:34,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 62 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 23:47:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2021-05-02 23:47:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:47:34,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:34,277 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:34,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:47:34,277 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1492807742, now seen corresponding path program 57 times [2021-05-02 23:47:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:34,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097912415] [2021-05-02 23:47:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:34,283 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1885 1000000) InVars {main_~i~0=v_main_~i~0_1885} OutVars{main_~i~0=v_main_~i~0_1885} AuxVars[] AssignedVars[] [2021-05-02 23:47:34,284 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:34,285 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,289 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:34,301 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:34,310 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:34,311 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1887 999999) InVars {main_~i~0=v_main_~i~0_1887} OutVars{main_~i~0=v_main_~i~0_1887} AuxVars[] AssignedVars[] [2021-05-02 23:47:34,312 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:34,312 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:34,316 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:34,327 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:34,344 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:34,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:36,503 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097912415] [2021-05-02 23:47:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097912415] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:36,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:36,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:47:36,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238520821] [2021-05-02 23:47:36,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:47:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:47:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:47:36,505 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 65 states, 64 states have (on average 1.890625) internal successors, (121), 63 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 23:47:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:41,518 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 23:47:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:47:41,518 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.890625) internal successors, (121), 63 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 23:47:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:41,519 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:47:41,519 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:47:41,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4382.0ms TimeCoverageRelationStatistics Valid=482, Invalid=14770, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:47:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:47:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-05-02 23:47:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 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 23:47:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2021-05-02 23:47:41,542 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2021-05-02 23:47:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:41,543 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2021-05-02 23:47:41,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.890625) internal successors, (121), 63 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 23:47:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2021-05-02 23:47:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 23:47:41,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:41,543 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:41,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:47:41,544 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1171158556, now seen corresponding path program 58 times [2021-05-02 23:47:41,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:41,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996402483] [2021-05-02 23:47:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:41,550 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1947 1000000) InVars {main_~i~0=v_main_~i~0_1947} OutVars{main_~i~0=v_main_~i~0_1947} AuxVars[] AssignedVars[] [2021-05-02 23:47:41,557 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:41,558 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:41,562 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:41,573 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:41,582 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:41,583 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1949 999999) InVars {main_~i~0=v_main_~i~0_1949} OutVars{main_~i~0=v_main_~i~0_1949} AuxVars[] AssignedVars[] [2021-05-02 23:47:41,584 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:41,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:41,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:41,601 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:41,610 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:41,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:43,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:43,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996402483] [2021-05-02 23:47:43,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996402483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:43,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:43,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:47:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592660253] [2021-05-02 23:47:43,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:47:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:47:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:47:43,574 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 64 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 23:47:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:48,825 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 23:47:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:47:48,826 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 64 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 23:47:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:48,827 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:47:48,827 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 23:47:48,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 4306.9ms TimeCoverageRelationStatistics Valid=490, Invalid=15260, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:47:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 23:47:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-05-02 23:47:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.008) internal successors, (126), 125 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 23:47:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2021-05-02 23:47:48,850 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2021-05-02 23:47:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:48,851 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2021-05-02 23:47:48,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 64 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 23:47:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2021-05-02 23:47:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 23:47:48,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:48,851 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:48,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:47:48,851 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1303936122, now seen corresponding path program 59 times [2021-05-02 23:47:48,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:48,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205356416] [2021-05-02 23:47:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:48,857 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2010 1000000) InVars {main_~i~0=v_main_~i~0_2010} OutVars{main_~i~0=v_main_~i~0_2010} AuxVars[] AssignedVars[] [2021-05-02 23:47:48,858 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:48,864 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:48,868 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:48,874 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:48,884 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:48,884 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2012 999999) InVars {main_~i~0=v_main_~i~0_2012} OutVars{main_~i~0=v_main_~i~0_2012} AuxVars[] AssignedVars[] [2021-05-02 23:47:48,885 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:48,891 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:48,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:48,908 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:48,918 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:48,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:50,974 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205356416] [2021-05-02 23:47:50,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [205356416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:50,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:50,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:47:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518195994] [2021-05-02 23:47:50,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:47:50,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:50,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:47:50,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:47:50,976 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 67 states, 66 states have (on average 1.893939393939394) internal successors, (125), 65 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 23:47:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:56,387 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 23:47:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:47:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.893939393939394) internal successors, (125), 65 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 23:47:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:56,390 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:47:56,390 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 23:47:56,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 51 SyntacticMatches, 12 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 4444.3ms TimeCoverageRelationStatistics Valid=498, Invalid=15758, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:47:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 23:47:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 23:47:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 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 23:47:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2021-05-02 23:47:56,415 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2021-05-02 23:47:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:56,415 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2021-05-02 23:47:56,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.893939393939394) internal successors, (125), 65 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 23:47:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2021-05-02 23:47:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 23:47:56,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:56,416 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:56,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:47:56,416 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash 54158168, now seen corresponding path program 60 times [2021-05-02 23:47:56,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:56,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160350744] [2021-05-02 23:47:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:56,425 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2074 1000000) InVars {main_~i~0=v_main_~i~0_2074} OutVars{main_~i~0=v_main_~i~0_2074} AuxVars[] AssignedVars[] [2021-05-02 23:47:56,426 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:56,432 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:56,440 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:56,447 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:56,456 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:56,457 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2076 999999) InVars {main_~i~0=v_main_~i~0_2076} OutVars{main_~i~0=v_main_~i~0_2076} AuxVars[] AssignedVars[] [2021-05-02 23:47:56,458 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:47:56,464 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:56,468 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:47:56,474 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:47:56,484 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:56,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:58,849 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160350744] [2021-05-02 23:47:58,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160350744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:58,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:58,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:47:58,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143213020] [2021-05-02 23:47:58,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:47:58,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:47:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:47:58,850 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 68 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 66 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 23:48:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:04,314 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 23:48:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:48:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 66 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 23:48:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:04,316 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:48:04,316 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:48:04,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 46 SyntacticMatches, 18 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 4796.3ms TimeCoverageRelationStatistics Valid=506, Invalid=16264, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:48:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:48:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 23:48:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 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 23:48:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2021-05-02 23:48:04,342 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2021-05-02 23:48:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:04,342 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2021-05-02 23:48:04,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 66 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 23:48:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2021-05-02 23:48:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 23:48:04,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:04,343 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:04,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:48:04,343 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1608387254, now seen corresponding path program 61 times [2021-05-02 23:48:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:04,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588685830] [2021-05-02 23:48:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:04,355 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2139 1000000) InVars {main_~i~0=v_main_~i~0_2139} OutVars{main_~i~0=v_main_~i~0_2139} AuxVars[] AssignedVars[] [2021-05-02 23:48:04,356 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:04,357 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:04,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:04,372 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:04,382 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:04,385 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2141 999999) InVars {main_~i~0=v_main_~i~0_2141} OutVars{main_~i~0=v_main_~i~0_2141} AuxVars[] AssignedVars[] [2021-05-02 23:48:04,386 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:04,393 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:04,397 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:04,403 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:04,413 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:06,698 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:06,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588685830] [2021-05-02 23:48:06,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [588685830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:06,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:06,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:48:06,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432173538] [2021-05-02 23:48:06,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:48:06,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:06,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:48:06,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:48:06,699 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 67 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 23:48:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:12,503 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 23:48:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:48:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 67 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 23:48:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:12,504 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:48:12,504 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 23:48:12,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 4844.7ms TimeCoverageRelationStatistics Valid=514, Invalid=16778, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:48:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 23:48:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-05-02 23:48:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 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 23:48:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2021-05-02 23:48:12,531 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2021-05-02 23:48:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:12,531 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2021-05-02 23:48:12,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 67 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 23:48:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2021-05-02 23:48:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 23:48:12,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:12,532 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:12,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:48:12,532 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash 573919892, now seen corresponding path program 62 times [2021-05-02 23:48:12,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:12,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732056920] [2021-05-02 23:48:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:12,537 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2205 1000000) InVars {main_~i~0=v_main_~i~0_2205} OutVars{main_~i~0=v_main_~i~0_2205} AuxVars[] AssignedVars[] [2021-05-02 23:48:12,538 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:12,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:12,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:12,555 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:12,565 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:12,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2207 999999) InVars {main_~i~0=v_main_~i~0_2207} OutVars{main_~i~0=v_main_~i~0_2207} AuxVars[] AssignedVars[] [2021-05-02 23:48:12,567 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:12,568 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:12,572 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:12,584 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:12,594 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:12,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:15,033 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732056920] [2021-05-02 23:48:15,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732056920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:15,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:15,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:48:15,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228819784] [2021-05-02 23:48:15,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:48:15,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:15,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:48:15,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:48:15,035 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 70 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 68 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 23:48:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:20,912 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 23:48:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:48:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 68 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 23:48:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:20,913 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:48:20,914 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:48:20,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 18 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 4998.3ms TimeCoverageRelationStatistics Valid=522, Invalid=17300, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:48:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:48:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-05-02 23:48:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 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 23:48:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2021-05-02 23:48:20,941 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2021-05-02 23:48:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:20,941 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2021-05-02 23:48:20,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 68 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 23:48:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2021-05-02 23:48:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:48:20,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:20,942 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:20,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:48:20,942 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:20,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1411769614, now seen corresponding path program 63 times [2021-05-02 23:48:20,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:20,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286792815] [2021-05-02 23:48:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:20,946 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2272 1000000) InVars {main_~i~0=v_main_~i~0_2272} OutVars{main_~i~0=v_main_~i~0_2272} AuxVars[] AssignedVars[] [2021-05-02 23:48:20,946 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:20,947 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:20,951 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:20,963 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:20,972 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:20,974 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2274 999999) InVars {main_~i~0=v_main_~i~0_2274} OutVars{main_~i~0=v_main_~i~0_2274} AuxVars[] AssignedVars[] [2021-05-02 23:48:20,975 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:20,975 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:20,979 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:20,991 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:21,001 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:21,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:23,461 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286792815] [2021-05-02 23:48:23,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286792815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:23,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:23,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:48:23,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674337876] [2021-05-02 23:48:23,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:48:23,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:23,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:48:23,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:48:23,462 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 71 states, 70 states have (on average 1.9) internal successors, (133), 69 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 23:48:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:29,516 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 23:48:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:48:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.9) internal successors, (133), 69 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 23:48:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:29,517 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:48:29,517 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 23:48:29,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 53 SyntacticMatches, 14 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 5099.7ms TimeCoverageRelationStatistics Valid=530, Invalid=17830, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:48:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 23:48:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-05-02 23:48:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 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 23:48:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2021-05-02 23:48:29,546 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2021-05-02 23:48:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:29,546 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2021-05-02 23:48:29,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 70 states have (on average 1.9) internal successors, (133), 69 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 23:48:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2021-05-02 23:48:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 23:48:29,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:29,547 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:29,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:48:29,547 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1601061840, now seen corresponding path program 64 times [2021-05-02 23:48:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:29,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824326777] [2021-05-02 23:48:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:29,554 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2340 1000000) InVars {main_~i~0=v_main_~i~0_2340} OutVars{main_~i~0=v_main_~i~0_2340} AuxVars[] AssignedVars[] [2021-05-02 23:48:29,555 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:29,555 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:29,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:29,571 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:29,581 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:29,581 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2342 999999) InVars {main_~i~0=v_main_~i~0_2342} OutVars{main_~i~0=v_main_~i~0_2342} AuxVars[] AssignedVars[] [2021-05-02 23:48:29,582 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:29,589 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:29,593 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:29,599 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:29,609 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:29,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:32,159 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824326777] [2021-05-02 23:48:32,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824326777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:32,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:32,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:48:32,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742035123] [2021-05-02 23:48:32,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:48:32,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:48:32,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:48:32,160 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 72 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 70 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 23:48:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:38,487 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 23:48:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:48:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 70 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 23:48:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:38,488 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:48:38,488 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 23:48:38,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 51 SyntacticMatches, 17 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 5278.9ms TimeCoverageRelationStatistics Valid=538, Invalid=18368, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:48:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 23:48:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-05-02 23:48:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 137 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 23:48:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2021-05-02 23:48:38,518 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2021-05-02 23:48:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:38,518 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2021-05-02 23:48:38,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 70 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 23:48:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2021-05-02 23:48:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 23:48:38,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:38,519 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:38,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:48:38,519 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2124131630, now seen corresponding path program 65 times [2021-05-02 23:48:38,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:38,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071804000] [2021-05-02 23:48:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:38,525 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2409 1000000) InVars {main_~i~0=v_main_~i~0_2409} OutVars{main_~i~0=v_main_~i~0_2409} AuxVars[] AssignedVars[] [2021-05-02 23:48:38,532 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:38,537 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:38,555 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:38,565 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:38,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2411 999999) InVars {main_~i~0=v_main_~i~0_2411} OutVars{main_~i~0=v_main_~i~0_2411} AuxVars[] AssignedVars[] [2021-05-02 23:48:38,568 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:38,574 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:38,579 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:38,585 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:38,595 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:38,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:41,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071804000] [2021-05-02 23:48:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071804000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:41,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:41,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:48:41,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015822699] [2021-05-02 23:48:41,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:48:41,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:41,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:48:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:48:41,220 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 73 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 71 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 23:48:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:47,656 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 23:48:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:48:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 71 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 23:48:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:47,658 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:48:47,658 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 23:48:47,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 51 SyntacticMatches, 18 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 5412.4ms TimeCoverageRelationStatistics Valid=546, Invalid=18914, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:48:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 23:48:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-05-02 23:48:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 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 23:48:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2021-05-02 23:48:47,687 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2021-05-02 23:48:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:47,687 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2021-05-02 23:48:47,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 71 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 23:48:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2021-05-02 23:48:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:48:47,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:47,688 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:47,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:48:47,688 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:47,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2011941108, now seen corresponding path program 66 times [2021-05-02 23:48:47,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:47,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575489739] [2021-05-02 23:48:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:47,695 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2479 1000000) InVars {main_~i~0=v_main_~i~0_2479} OutVars{main_~i~0=v_main_~i~0_2479} AuxVars[] AssignedVars[] [2021-05-02 23:48:47,696 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:47,697 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:47,701 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:47,712 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:47,722 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:47,723 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2481 999999) InVars {main_~i~0=v_main_~i~0_2481} OutVars{main_~i~0=v_main_~i~0_2481} AuxVars[] AssignedVars[] [2021-05-02 23:48:47,728 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:47,735 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:47,739 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:47,745 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:47,755 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:47,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:50,683 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:50,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575489739] [2021-05-02 23:48:50,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575489739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:50,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:50,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:48:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559134021] [2021-05-02 23:48:50,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:48:50,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:48:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:48:50,684 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 72 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 23:48:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:57,383 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-02 23:48:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:48:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 72 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 23:48:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:57,386 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:48:57,386 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 23:48:57,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 49 SyntacticMatches, 21 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 5843.6ms TimeCoverageRelationStatistics Valid=554, Invalid=19468, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:48:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 23:48:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-05-02 23:48:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 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 23:48:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2021-05-02 23:48:57,418 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2021-05-02 23:48:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:57,418 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2021-05-02 23:48:57,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 72 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 23:48:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2021-05-02 23:48:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:48:57,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:57,419 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:57,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:48:57,419 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash 361873770, now seen corresponding path program 67 times [2021-05-02 23:48:57,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:57,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688309019] [2021-05-02 23:48:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:57,428 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2550 1000000) InVars {main_~i~0=v_main_~i~0_2550} OutVars{main_~i~0=v_main_~i~0_2550} AuxVars[] AssignedVars[] [2021-05-02 23:48:57,429 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:57,436 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:57,454 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:57,467 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:57,468 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2552 999999) InVars {main_~i~0=v_main_~i~0_2552} OutVars{main_~i~0=v_main_~i~0_2552} AuxVars[] AssignedVars[] [2021-05-02 23:48:57,469 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:48:57,470 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:57,481 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:48:57,495 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:48:57,507 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:57,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:00,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:00,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688309019] [2021-05-02 23:49:00,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [688309019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:00,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:00,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:49:00,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152852736] [2021-05-02 23:49:00,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:49:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:49:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:49:00,524 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 75 states, 74 states have (on average 1.9054054054054055) internal successors, (141), 73 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 23:49:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:07,555 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-02 23:49:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:49:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.9054054054054055) internal successors, (141), 73 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 23:49:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:07,557 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:49:07,557 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:49:07,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 47 SyntacticMatches, 24 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 6051.6ms TimeCoverageRelationStatistics Valid=562, Invalid=20030, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:49:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:49:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-05-02 23:49:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 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 23:49:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2021-05-02 23:49:07,588 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2021-05-02 23:49:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:07,588 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2021-05-02 23:49:07,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 74 states have (on average 1.9054054054054055) internal successors, (141), 73 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 23:49:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2021-05-02 23:49:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:49:07,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:07,589 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:07,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:49:07,590 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:07,590 INFO L82 PathProgramCache]: Analyzing trace with hash 970337352, now seen corresponding path program 68 times [2021-05-02 23:49:07,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:07,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131021567] [2021-05-02 23:49:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:07,594 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2622 1000000) InVars {main_~i~0=v_main_~i~0_2622} OutVars{main_~i~0=v_main_~i~0_2622} AuxVars[] AssignedVars[] [2021-05-02 23:49:07,595 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:07,595 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:07,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:07,612 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:07,625 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:07,626 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2624 999999) InVars {main_~i~0=v_main_~i~0_2624} OutVars{main_~i~0=v_main_~i~0_2624} AuxVars[] AssignedVars[] [2021-05-02 23:49:07,627 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:07,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:07,632 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:07,643 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:07,654 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:07,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:10,601 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:10,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131021567] [2021-05-02 23:49:10,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131021567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:10,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:10,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:49:10,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071171220] [2021-05-02 23:49:10,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:49:10,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:10,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:49:10,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:49:10,603 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 76 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 74 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 23:49:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:17,732 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-02 23:49:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:49:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 74 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 23:49:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:17,733 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:49:17,733 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 23:49:17,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 53 SyntacticMatches, 19 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 6017.7ms TimeCoverageRelationStatistics Valid=570, Invalid=20600, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 23:49:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 23:49:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-05-02 23:49:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 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 23:49:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2021-05-02 23:49:17,766 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2021-05-02 23:49:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:17,767 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2021-05-02 23:49:17,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 74 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 23:49:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2021-05-02 23:49:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:49:17,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:17,768 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:17,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:49:17,768 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1588287398, now seen corresponding path program 69 times [2021-05-02 23:49:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:17,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700711077] [2021-05-02 23:49:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:17,772 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2695 1000000) InVars {main_~i~0=v_main_~i~0_2695} OutVars{main_~i~0=v_main_~i~0_2695} AuxVars[] AssignedVars[] [2021-05-02 23:49:17,777 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:17,784 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,789 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:17,795 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:17,805 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:17,806 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2697 999999) InVars {main_~i~0=v_main_~i~0_2697} OutVars{main_~i~0=v_main_~i~0_2697} AuxVars[] AssignedVars[] [2021-05-02 23:49:17,807 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:17,807 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,811 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:17,824 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:17,834 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:17,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:20,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:20,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700711077] [2021-05-02 23:49:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700711077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:20,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:20,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:49:20,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824721016] [2021-05-02 23:49:20,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:49:20,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:49:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:49:20,832 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 77 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 75 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 23:49:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:28,205 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-02 23:49:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:49:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 75 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 23:49:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:28,207 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:49:28,207 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:49:28,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 55 SyntacticMatches, 18 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 6187.5ms TimeCoverageRelationStatistics Valid=578, Invalid=21178, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 23:49:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:49:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-05-02 23:49:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 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 23:49:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2021-05-02 23:49:28,241 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2021-05-02 23:49:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:28,241 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2021-05-02 23:49:28,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 75 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 23:49:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2021-05-02 23:49:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 23:49:28,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:28,242 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:28,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:49:28,242 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1562172540, now seen corresponding path program 70 times [2021-05-02 23:49:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:28,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422880732] [2021-05-02 23:49:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:28,246 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2769 1000000) InVars {main_~i~0=v_main_~i~0_2769} OutVars{main_~i~0=v_main_~i~0_2769} AuxVars[] AssignedVars[] [2021-05-02 23:49:28,247 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:28,248 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,252 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:28,265 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:28,275 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:28,280 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2771 999999) InVars {main_~i~0=v_main_~i~0_2771} OutVars{main_~i~0=v_main_~i~0_2771} AuxVars[] AssignedVars[] [2021-05-02 23:49:28,281 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:28,282 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:28,299 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:28,309 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:31,301 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:31,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422880732] [2021-05-02 23:49:31,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422880732] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:31,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:31,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:49:31,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654577336] [2021-05-02 23:49:31,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:49:31,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:49:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:49:31,302 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 78 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 76 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 23:49:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:38,986 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-02 23:49:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:49:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 76 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 23:49:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:38,987 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:49:38,987 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 23:49:38,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 59 SyntacticMatches, 15 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 6296.7ms TimeCoverageRelationStatistics Valid=586, Invalid=21764, Unknown=0, NotChecked=0, Total=22350 [2021-05-02 23:49:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 23:49:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-05-02 23:49:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 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 23:49:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2021-05-02 23:49:39,023 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2021-05-02 23:49:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:39,023 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2021-05-02 23:49:39,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 76 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 23:49:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2021-05-02 23:49:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:49:39,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:39,024 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:39,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:49:39,025 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1202229278, now seen corresponding path program 71 times [2021-05-02 23:49:39,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:39,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17168209] [2021-05-02 23:49:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:39,030 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2844 1000000) InVars {main_~i~0=v_main_~i~0_2844} OutVars{main_~i~0=v_main_~i~0_2844} AuxVars[] AssignedVars[] [2021-05-02 23:49:39,032 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:39,039 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:39,053 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:39,065 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:39,066 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2846 999999) InVars {main_~i~0=v_main_~i~0_2846} OutVars{main_~i~0=v_main_~i~0_2846} AuxVars[] AssignedVars[] [2021-05-02 23:49:39,067 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:39,075 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:39,086 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:39,103 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:39,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:42,281 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17168209] [2021-05-02 23:49:42,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [17168209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:42,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:42,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:49:42,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305019251] [2021-05-02 23:49:42,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:49:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:49:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:49:42,283 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 77 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 23:49:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:50,343 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-02 23:49:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:49:50,344 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 77 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 23:49:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:50,345 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:49:50,345 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:49:50,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 62 SyntacticMatches, 13 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 6640.3ms TimeCoverageRelationStatistics Valid=594, Invalid=22358, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 23:49:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:49:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-05-02 23:49:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 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 23:49:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2021-05-02 23:49:50,380 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2021-05-02 23:49:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:50,380 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2021-05-02 23:49:50,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 77 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 23:49:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2021-05-02 23:49:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:49:50,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:50,381 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:50,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:49:50,381 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1105861824, now seen corresponding path program 72 times [2021-05-02 23:49:50,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:50,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371857744] [2021-05-02 23:49:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:50,394 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2920 1000000) InVars {main_~i~0=v_main_~i~0_2920} OutVars{main_~i~0=v_main_~i~0_2920} AuxVars[] AssignedVars[] [2021-05-02 23:49:50,395 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:50,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,399 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:50,412 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:50,424 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:50,425 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2922 999999) InVars {main_~i~0=v_main_~i~0_2922} OutVars{main_~i~0=v_main_~i~0_2922} AuxVars[] AssignedVars[] [2021-05-02 23:49:50,426 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:49:50,433 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:49:50,444 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:49:50,454 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:53,832 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:53,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371857744] [2021-05-02 23:49:53,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371857744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:53,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:53,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:49:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261184545] [2021-05-02 23:49:53,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:49:53,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:49:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:49:53,833 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 78 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 23:50:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:02,110 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-02 23:50:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:50:02,111 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 78 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 23:50:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:02,111 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:50:02,111 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:50:02,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 6823.8ms TimeCoverageRelationStatistics Valid=602, Invalid=22960, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 23:50:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:50:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-05-02 23:50:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 153 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 23:50:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2021-05-02 23:50:02,178 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2021-05-02 23:50:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:02,178 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2021-05-02 23:50:02,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 78 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 23:50:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2021-05-02 23:50:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 23:50:02,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:02,179 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:02,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:50:02,180 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1316681186, now seen corresponding path program 73 times [2021-05-02 23:50:02,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:02,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666807154] [2021-05-02 23:50:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:02,188 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2997 1000000) InVars {main_~i~0=v_main_~i~0_2997} OutVars{main_~i~0=v_main_~i~0_2997} AuxVars[] AssignedVars[] [2021-05-02 23:50:02,190 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:02,190 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,195 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:02,209 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:02,223 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:02,224 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2999 999999) InVars {main_~i~0=v_main_~i~0_2999} OutVars{main_~i~0=v_main_~i~0_2999} AuxVars[] AssignedVars[] [2021-05-02 23:50:02,228 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:02,241 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,248 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:02,254 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:02,266 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:06,212 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666807154] [2021-05-02 23:50:06,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666807154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:06,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:06,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:50:06,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773686616] [2021-05-02 23:50:06,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:50:06,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:06,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:50:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:50:06,214 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 81 states, 80 states have (on average 1.9125) internal successors, (153), 79 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 23:50:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:15,721 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-02 23:50:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:50:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.9125) internal successors, (153), 79 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 23:50:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:15,723 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:50:15,723 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:50:15,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 58 SyntacticMatches, 19 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 7934.4ms TimeCoverageRelationStatistics Valid=610, Invalid=23570, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 23:50:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:50:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 23:50:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 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 23:50:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2021-05-02 23:50:15,762 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2021-05-02 23:50:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:15,762 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2021-05-02 23:50:15,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 80 states have (on average 1.9125) internal successors, (153), 79 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 23:50:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2021-05-02 23:50:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 23:50:15,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:15,763 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:15,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:50:15,764 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1508239364, now seen corresponding path program 74 times [2021-05-02 23:50:15,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:15,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421606264] [2021-05-02 23:50:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:15,768 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3075 1000000) InVars {main_~i~0=v_main_~i~0_3075} OutVars{main_~i~0=v_main_~i~0_3075} AuxVars[] AssignedVars[] [2021-05-02 23:50:15,781 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:15,789 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:15,794 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:15,800 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:15,810 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:15,811 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3077 999999) InVars {main_~i~0=v_main_~i~0_3077} OutVars{main_~i~0=v_main_~i~0_3077} AuxVars[] AssignedVars[] [2021-05-02 23:50:15,816 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:15,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:15,821 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:15,833 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:15,843 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:15,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:19,624 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:19,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421606264] [2021-05-02 23:50:19,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [421606264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:19,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:19,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:50:19,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666553870] [2021-05-02 23:50:19,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:50:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:19,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:50:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:50:19,626 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 82 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 80 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 23:50:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:28,987 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-02 23:50:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:50:28,988 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 80 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 23:50:28,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:28,989 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:50:28,989 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 23:50:28,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 58 SyntacticMatches, 20 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 7721.0ms TimeCoverageRelationStatistics Valid=618, Invalid=24188, Unknown=0, NotChecked=0, Total=24806 [2021-05-02 23:50:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 23:50:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-05-02 23:50:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 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 23:50:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2021-05-02 23:50:29,030 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2021-05-02 23:50:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:29,030 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2021-05-02 23:50:29,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 80 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 23:50:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2021-05-02 23:50:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:50:29,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:29,031 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:29,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:50:29,031 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -912054694, now seen corresponding path program 75 times [2021-05-02 23:50:29,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:29,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284667423] [2021-05-02 23:50:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:29,040 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3154 1000000) InVars {main_~i~0=v_main_~i~0_3154} OutVars{main_~i~0=v_main_~i~0_3154} AuxVars[] AssignedVars[] [2021-05-02 23:50:29,042 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:29,043 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:29,048 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:29,061 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:29,072 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:29,073 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3156 999999) InVars {main_~i~0=v_main_~i~0_3156} OutVars{main_~i~0=v_main_~i~0_3156} AuxVars[] AssignedVars[] [2021-05-02 23:50:29,080 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:29,081 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:29,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:29,102 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:29,113 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:29,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:33,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284667423] [2021-05-02 23:50:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284667423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:33,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:33,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:50:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103363026] [2021-05-02 23:50:33,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:50:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:50:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:50:33,124 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 83 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 81 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 23:50:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:42,776 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-02 23:50:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:50:42,777 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 81 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 23:50:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:42,778 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:50:42,778 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:50:42,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 54 SyntacticMatches, 25 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 8149.4ms TimeCoverageRelationStatistics Valid=626, Invalid=24814, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 23:50:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:50:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 23:50:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 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 23:50:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2021-05-02 23:50:42,822 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2021-05-02 23:50:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:42,823 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2021-05-02 23:50:42,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 81 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 23:50:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2021-05-02 23:50:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 23:50:42,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:42,824 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:42,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:50:42,824 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash 790762808, now seen corresponding path program 76 times [2021-05-02 23:50:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:42,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567441327] [2021-05-02 23:50:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:42,829 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3234 1000000) InVars {main_~i~0=v_main_~i~0_3234} OutVars{main_~i~0=v_main_~i~0_3234} AuxVars[] AssignedVars[] [2021-05-02 23:50:42,831 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:42,838 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:42,850 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:42,861 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:42,863 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3236 999999) InVars {main_~i~0=v_main_~i~0_3236} OutVars{main_~i~0=v_main_~i~0_3236} AuxVars[] AssignedVars[] [2021-05-02 23:50:42,864 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:42,871 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,876 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:42,884 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:42,895 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:42,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:46,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:46,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567441327] [2021-05-02 23:50:46,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [567441327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:46,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:46,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:50:46,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246706184] [2021-05-02 23:50:46,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:50:46,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:50:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:50:46,856 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 82 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 23:50:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:57,446 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-02 23:50:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:50:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 82 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 23:50:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:57,447 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:50:57,447 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 23:50:57,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3125 ImplicationChecksByTransitivity, 8442.7ms TimeCoverageRelationStatistics Valid=634, Invalid=25448, Unknown=0, NotChecked=0, Total=26082 [2021-05-02 23:50:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 23:50:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-05-02 23:50:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 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 23:50:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-05-02 23:50:57,487 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2021-05-02 23:50:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:57,487 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-05-02 23:50:57,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 82 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 23:50:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-05-02 23:50:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:50:57,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:57,488 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:57,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:50:57,488 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 815842454, now seen corresponding path program 77 times [2021-05-02 23:50:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358237726] [2021-05-02 23:50:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:57,500 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3315 1000000) InVars {main_~i~0=v_main_~i~0_3315} OutVars{main_~i~0=v_main_~i~0_3315} AuxVars[] AssignedVars[] [2021-05-02 23:50:57,502 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:57,502 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:57,508 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:57,525 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:57,539 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:57,540 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3317 999999) InVars {main_~i~0=v_main_~i~0_3317} OutVars{main_~i~0=v_main_~i~0_3317} AuxVars[] AssignedVars[] [2021-05-02 23:50:57,542 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:50:57,550 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:57,555 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:50:57,562 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:50:57,574 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:57,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:02,060 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:02,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358237726] [2021-05-02 23:51:02,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358237726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:02,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:02,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:51:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018052852] [2021-05-02 23:51:02,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:51:02,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:51:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:51:02,062 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 83 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 23:51:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:12,381 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-02 23:51:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:51:12,382 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 83 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 23:51:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:12,383 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:51:12,383 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:51:12,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 53 SyntacticMatches, 28 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 8788.6ms TimeCoverageRelationStatistics Valid=642, Invalid=26090, Unknown=0, NotChecked=0, Total=26732 [2021-05-02 23:51:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:51:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-05-02 23:51:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 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 23:51:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2021-05-02 23:51:12,425 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2021-05-02 23:51:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:12,425 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2021-05-02 23:51:12,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 83 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 23:51:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2021-05-02 23:51:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:51:12,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:12,426 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:12,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:51:12,426 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash -852421516, now seen corresponding path program 78 times [2021-05-02 23:51:12,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754117355] [2021-05-02 23:51:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:12,434 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3397 1000000) InVars {main_~i~0=v_main_~i~0_3397} OutVars{main_~i~0=v_main_~i~0_3397} AuxVars[] AssignedVars[] [2021-05-02 23:51:12,436 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:12,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:12,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:12,462 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:12,480 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:12,482 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3399 999999) InVars {main_~i~0=v_main_~i~0_3399} OutVars{main_~i~0=v_main_~i~0_3399} AuxVars[] AssignedVars[] [2021-05-02 23:51:12,484 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:12,494 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:12,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:12,509 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:12,523 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:12,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:16,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754117355] [2021-05-02 23:51:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [754117355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:16,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:16,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:51:16,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223789382] [2021-05-02 23:51:16,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:51:16,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:16,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:51:16,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:51:16,727 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 86 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 84 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 23:51:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:27,256 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-02 23:51:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:51:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 84 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 23:51:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:27,257 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:51:27,257 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:51:27,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 57 SyntacticMatches, 25 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3294 ImplicationChecksByTransitivity, 8631.8ms TimeCoverageRelationStatistics Valid=650, Invalid=26740, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 23:51:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:51:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-05-02 23:51:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 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 23:51:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2021-05-02 23:51:27,299 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2021-05-02 23:51:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:27,300 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2021-05-02 23:51:27,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 84 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 23:51:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2021-05-02 23:51:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:51:27,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:27,301 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:27,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:51:27,301 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2031295278, now seen corresponding path program 79 times [2021-05-02 23:51:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335788871] [2021-05-02 23:51:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:27,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3480 1000000) InVars {main_~i~0=v_main_~i~0_3480} OutVars{main_~i~0=v_main_~i~0_3480} AuxVars[] AssignedVars[] [2021-05-02 23:51:27,311 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:27,311 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:27,317 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:27,332 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:27,345 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:27,347 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3482 999999) InVars {main_~i~0=v_main_~i~0_3482} OutVars{main_~i~0=v_main_~i~0_3482} AuxVars[] AssignedVars[] [2021-05-02 23:51:27,348 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:27,348 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:27,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:27,377 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:27,392 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:27,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:27,449 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 23:51:31,531 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:31,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335788871] [2021-05-02 23:51:31,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [335788871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:31,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:31,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:51:31,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257002395] [2021-05-02 23:51:31,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:51:31,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:51:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:51:31,534 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 87 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 85 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 23:51:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:42,753 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-02 23:51:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:51:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 85 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 23:51:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:42,755 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:51:42,755 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:51:42,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 67 SyntacticMatches, 16 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 8896.0ms TimeCoverageRelationStatistics Valid=658, Invalid=27398, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 23:51:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:51:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-05-02 23:51:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 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 23:51:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2021-05-02 23:51:42,804 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2021-05-02 23:51:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:42,805 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2021-05-02 23:51:42,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 85 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 23:51:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2021-05-02 23:51:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 23:51:42,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:42,805 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:42,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:51:42,806 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1057614416, now seen corresponding path program 80 times [2021-05-02 23:51:42,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:42,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721684277] [2021-05-02 23:51:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:42,811 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3564 1000000) InVars {main_~i~0=v_main_~i~0_3564} OutVars{main_~i~0=v_main_~i~0_3564} AuxVars[] AssignedVars[] [2021-05-02 23:51:42,812 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:42,820 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:42,825 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:42,833 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:42,845 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:42,846 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3566 999999) InVars {main_~i~0=v_main_~i~0_3566} OutVars{main_~i~0=v_main_~i~0_3566} AuxVars[] AssignedVars[] [2021-05-02 23:51:42,847 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:42,856 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:42,862 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:42,870 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:42,885 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:42,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:47,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:47,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721684277] [2021-05-02 23:51:47,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1721684277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:47,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:47,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:51:47,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681599951] [2021-05-02 23:51:47,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:51:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:51:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:51:47,440 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 88 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 86 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 23:51:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:58,682 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-02 23:51:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:51:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 86 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 23:51:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:58,684 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:51:58,684 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 23:51:58,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 62 SyntacticMatches, 22 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3451 ImplicationChecksByTransitivity, 9243.0ms TimeCoverageRelationStatistics Valid=666, Invalid=28064, Unknown=0, NotChecked=0, Total=28730 [2021-05-02 23:51:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 23:51:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-05-02 23:51:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 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 23:51:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2021-05-02 23:51:58,727 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2021-05-02 23:51:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:58,728 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2021-05-02 23:51:58,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 86 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 23:51:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2021-05-02 23:51:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:51:58,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:58,729 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:58,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:51:58,729 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1653176562, now seen corresponding path program 81 times [2021-05-02 23:51:58,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:58,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461119281] [2021-05-02 23:51:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:58,739 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3649 1000000) InVars {main_~i~0=v_main_~i~0_3649} OutVars{main_~i~0=v_main_~i~0_3649} AuxVars[] AssignedVars[] [2021-05-02 23:51:58,740 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:58,741 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:58,745 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:58,758 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:58,771 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:58,772 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3651 999999) InVars {main_~i~0=v_main_~i~0_3651} OutVars{main_~i~0=v_main_~i~0_3651} AuxVars[] AssignedVars[] [2021-05-02 23:51:58,773 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:51:58,780 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:58,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:51:58,792 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:51:58,809 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:58,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:03,226 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461119281] [2021-05-02 23:52:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461119281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:03,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:03,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:52:03,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535736175] [2021-05-02 23:52:03,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:52:03,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:03,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:52:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:52:03,228 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 89 states, 88 states have (on average 1.9204545454545454) internal successors, (169), 87 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 23:52:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:15,049 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-02 23:52:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:52:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9204545454545454) internal successors, (169), 87 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 23:52:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:15,051 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:52:15,051 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:52:15,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 67 SyntacticMatches, 18 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 9378.9ms TimeCoverageRelationStatistics Valid=674, Invalid=28738, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 23:52:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:52:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-05-02 23:52:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 171 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 23:52:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2021-05-02 23:52:15,095 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2021-05-02 23:52:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:15,095 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2021-05-02 23:52:15,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.9204545454545454) internal successors, (169), 87 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 23:52:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2021-05-02 23:52:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:52:15,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:15,096 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:15,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:52:15,097 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1537218796, now seen corresponding path program 82 times [2021-05-02 23:52:15,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:15,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509759983] [2021-05-02 23:52:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:15,108 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3735 1000000) InVars {main_~i~0=v_main_~i~0_3735} OutVars{main_~i~0=v_main_~i~0_3735} AuxVars[] AssignedVars[] [2021-05-02 23:52:15,110 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:52:15,111 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,116 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:15,132 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:52:15,146 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:15,148 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3737 999999) InVars {main_~i~0=v_main_~i~0_3737} OutVars{main_~i~0=v_main_~i~0_3737} AuxVars[] AssignedVars[] [2021-05-02 23:52:15,149 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:52:15,160 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,166 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:15,174 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:52:15,187 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:15,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:19,842 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:19,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509759983] [2021-05-02 23:52:19,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [509759983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:19,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:19,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:52:19,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417368427] [2021-05-02 23:52:19,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:52:19,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:52:19,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:52:19,844 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 88 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 23:52:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:32,685 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-02 23:52:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:52:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 88 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 23:52:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:32,690 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:52:32,690 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:52:32,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 69 SyntacticMatches, 17 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3608 ImplicationChecksByTransitivity, 9947.3ms TimeCoverageRelationStatistics Valid=682, Invalid=29420, Unknown=0, NotChecked=0, Total=30102 [2021-05-02 23:52:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:52:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-05-02 23:52:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 173 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 23:52:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2021-05-02 23:52:32,736 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2021-05-02 23:52:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:32,736 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2021-05-02 23:52:32,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 88 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 23:52:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2021-05-02 23:52:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 23:52:32,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:32,737 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:32,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:52:32,737 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash 900508490, now seen corresponding path program 83 times [2021-05-02 23:52:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:32,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588775593] [2021-05-02 23:52:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:32,743 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3822 1000000) InVars {main_~i~0=v_main_~i~0_3822} OutVars{main_~i~0=v_main_~i~0_3822} AuxVars[] AssignedVars[] [2021-05-02 23:52:32,754 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:52:32,766 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:32,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:32,786 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:52:32,801 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:32,802 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3824 999999) InVars {main_~i~0=v_main_~i~0_3824} OutVars{main_~i~0=v_main_~i~0_3824} AuxVars[] AssignedVars[] [2021-05-02 23:52:32,803 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:52:32,813 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:32,820 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:32,829 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:52:32,843 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:32,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:37,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588775593] [2021-05-02 23:52:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588775593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:37,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:37,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:52:37,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063142368] [2021-05-02 23:52:37,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:52:37,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:52:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:52:37,809 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand has 91 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 89 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:50,815 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-02 23:52:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:52:50,815 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 89 states have internal predecessors, (173), 2 states have call successors, (3), 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 177 [2021-05-02 23:52:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:50,816 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:52:50,816 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 23:52:50,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 70 SyntacticMatches, 17 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3693 ImplicationChecksByTransitivity, 10415.0ms TimeCoverageRelationStatistics Valid=690, Invalid=30110, Unknown=0, NotChecked=0, Total=30800 [2021-05-02 23:52:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 23:52:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-05-02 23:52:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 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 23:52:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2021-05-02 23:52:50,862 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2021-05-02 23:52:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:50,862 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2021-05-02 23:52:50,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 89 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2021-05-02 23:52:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 23:52:50,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:50,863 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:50,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:52:50,863 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:50,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1092739544, now seen corresponding path program 84 times [2021-05-02 23:52:50,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:50,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487959416] [2021-05-02 23:52:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:50,868 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3910 1000000) InVars {main_~i~0=v_main_~i~0_3910} OutVars{main_~i~0=v_main_~i~0_3910} AuxVars[] AssignedVars[] [2021-05-02 23:52:50,870 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:52:50,870 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:50,875 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:50,889 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:52:50,901 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:50,902 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3912 999999) InVars {main_~i~0=v_main_~i~0_3912} OutVars{main_~i~0=v_main_~i~0_3912} AuxVars[] AssignedVars[] [2021-05-02 23:52:50,905 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:52:50,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:50,918 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:52:50,924 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:52:50,936 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:50,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:56,219 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:56,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487959416] [2021-05-02 23:52:56,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487959416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:56,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:56,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:52:56,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483459827] [2021-05-02 23:52:56,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:52:56,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:56,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:52:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:52:56,221 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 92 states, 91 states have (on average 1.9230769230769231) internal successors, (175), 90 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:08,565 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-02 23:53:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:53:08,566 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.9230769230769231) internal successors, (175), 90 states have internal predecessors, (175), 2 states have call successors, (3), 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 179 [2021-05-02 23:53:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:08,567 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:53:08,567 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 23:53:08,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 65 SyntacticMatches, 23 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3791 ImplicationChecksByTransitivity, 10356.4ms TimeCoverageRelationStatistics Valid=698, Invalid=30808, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 23:53:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 23:53:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-05-02 23:53:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0056497175141244) internal successors, (178), 177 states have internal predecessors, (178), 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 23:53:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2021-05-02 23:53:08,622 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2021-05-02 23:53:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:08,623 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2021-05-02 23:53:08,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 91 states have (on average 1.9230769230769231) internal successors, (175), 90 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2021-05-02 23:53:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 23:53:08,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:08,624 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:08,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:53:08,624 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1048686202, now seen corresponding path program 85 times [2021-05-02 23:53:08,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:08,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863255566] [2021-05-02 23:53:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:08,629 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3999 1000000) InVars {main_~i~0=v_main_~i~0_3999} OutVars{main_~i~0=v_main_~i~0_3999} AuxVars[] AssignedVars[] [2021-05-02 23:53:08,631 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:53:08,638 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:08,643 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:08,650 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:53:08,662 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:08,663 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4001 999999) InVars {main_~i~0=v_main_~i~0_4001} OutVars{main_~i~0=v_main_~i~0_4001} AuxVars[] AssignedVars[] [2021-05-02 23:53:08,664 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:53:08,665 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:08,670 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:08,683 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:53:08,695 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:08,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:13,367 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:13,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863255566] [2021-05-02 23:53:13,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [863255566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:13,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:13,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:53:13,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963252680] [2021-05-02 23:53:13,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:53:13,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:53:13,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:53:13,369 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 93 states, 92 states have (on average 1.923913043478261) internal successors, (177), 91 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:25,765 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-02 23:53:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:53:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.923913043478261) internal successors, (177), 91 states have internal predecessors, (177), 2 states have call successors, (3), 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 181 [2021-05-02 23:53:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:25,767 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:53:25,767 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:53:25,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 74 SyntacticMatches, 15 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 9768.3ms TimeCoverageRelationStatistics Valid=706, Invalid=31514, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 23:53:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:53:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-05-02 23:53:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.005586592178771) internal successors, (180), 179 states have internal predecessors, (180), 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 23:53:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2021-05-02 23:53:25,815 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2021-05-02 23:53:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:25,815 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2021-05-02 23:53:25,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 92 states have (on average 1.923913043478261) internal successors, (177), 91 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2021-05-02 23:53:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 23:53:25,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:25,816 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:25,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:53:25,817 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1663097500, now seen corresponding path program 86 times [2021-05-02 23:53:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:25,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915088690] [2021-05-02 23:53:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:25,822 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4089 1000000) InVars {main_~i~0=v_main_~i~0_4089} OutVars{main_~i~0=v_main_~i~0_4089} AuxVars[] AssignedVars[] [2021-05-02 23:53:25,823 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:53:25,832 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:25,837 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:25,846 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:53:25,860 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:25,862 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4091 999999) InVars {main_~i~0=v_main_~i~0_4091} OutVars{main_~i~0=v_main_~i~0_4091} AuxVars[] AssignedVars[] [2021-05-02 23:53:25,863 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:53:25,863 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:25,872 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:25,887 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:53:25,900 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:25,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:31,188 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:31,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915088690] [2021-05-02 23:53:31,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [915088690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:31,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:31,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:53:31,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299628356] [2021-05-02 23:53:31,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:53:31,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:31,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:53:31,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:53:31,190 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 94 states, 93 states have (on average 1.924731182795699) internal successors, (179), 92 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:44,294 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-02 23:53:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:53:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.924731182795699) internal successors, (179), 92 states have internal predecessors, (179), 2 states have call successors, (3), 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 183 [2021-05-02 23:53:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:44,296 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:53:44,296 INFO L226 Difference]: Without dead ends: 187 [2021-05-02 23:53:44,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 61 SyntacticMatches, 29 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3978 ImplicationChecksByTransitivity, 10691.6ms TimeCoverageRelationStatistics Valid=714, Invalid=32228, Unknown=0, NotChecked=0, Total=32942 [2021-05-02 23:53:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-02 23:53:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-05-02 23:53:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0055248618784531) internal successors, (182), 181 states have internal predecessors, (182), 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 23:53:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2021-05-02 23:53:44,346 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2021-05-02 23:53:44,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:44,346 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2021-05-02 23:53:44,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 93 states have (on average 1.924731182795699) internal successors, (179), 92 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2021-05-02 23:53:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:53:44,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:44,347 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:44,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:53:44,347 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:44,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:44,347 INFO L82 PathProgramCache]: Analyzing trace with hash 593131970, now seen corresponding path program 87 times [2021-05-02 23:53:44,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:44,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106928395] [2021-05-02 23:53:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:44,353 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4180 1000000) InVars {main_~i~0=v_main_~i~0_4180} OutVars{main_~i~0=v_main_~i~0_4180} AuxVars[] AssignedVars[] [2021-05-02 23:53:44,354 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:53:44,355 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:44,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:44,377 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:53:44,391 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:44,393 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4182 999999) InVars {main_~i~0=v_main_~i~0_4182} OutVars{main_~i~0=v_main_~i~0_4182} AuxVars[] AssignedVars[] [2021-05-02 23:53:44,394 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:53:44,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:44,402 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:53:44,419 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:53:44,433 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:44,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:49,672 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:49,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106928395] [2021-05-02 23:53:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1106928395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:49,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:49,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:53:49,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735593507] [2021-05-02 23:53:49,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:53:49,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:49,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:53:49,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:53:49,674 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 95 states, 94 states have (on average 1.925531914893617) internal successors, (181), 93 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:03,971 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-02 23:54:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:54:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.925531914893617) internal successors, (181), 93 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2021-05-02 23:54:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:03,973 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:54:03,973 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:54:03,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 71 SyntacticMatches, 20 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4049 ImplicationChecksByTransitivity, 11092.1ms TimeCoverageRelationStatistics Valid=722, Invalid=32950, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 23:54:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:54:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-05-02 23:54:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.005464480874317) internal successors, (184), 183 states have internal predecessors, (184), 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 23:54:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2021-05-02 23:54:04,023 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2021-05-02 23:54:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:04,024 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2021-05-02 23:54:04,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 94 states have (on average 1.925531914893617) internal successors, (181), 93 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2021-05-02 23:54:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 23:54:04,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:04,024 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:04,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:54:04,025 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash -128831840, now seen corresponding path program 88 times [2021-05-02 23:54:04,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:04,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896441742] [2021-05-02 23:54:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:04,040 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4272 1000000) InVars {main_~i~0=v_main_~i~0_4272} OutVars{main_~i~0=v_main_~i~0_4272} AuxVars[] AssignedVars[] [2021-05-02 23:54:04,042 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:54:04,042 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:04,048 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:54:04,063 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:54:04,076 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:04,077 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4274 999999) InVars {main_~i~0=v_main_~i~0_4274} OutVars{main_~i~0=v_main_~i~0_4274} AuxVars[] AssignedVars[] [2021-05-02 23:54:04,081 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:54:04,082 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:04,088 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:54:04,102 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:54:04,116 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:04,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:54:09,881 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:09,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896441742] [2021-05-02 23:54:09,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [896441742] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:09,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:09,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:54:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548225695] [2021-05-02 23:54:09,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:54:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:54:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:54:09,884 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand has 96 states, 95 states have (on average 1.9263157894736842) internal successors, (183), 94 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:24,508 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-02 23:54:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:54:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.9263157894736842) internal successors, (183), 94 states have internal predecessors, (183), 2 states have call successors, (3), 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 187 [2021-05-02 23:54:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:24,510 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:54:24,510 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 23:54:24,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 65 SyntacticMatches, 27 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4153 ImplicationChecksByTransitivity, 11711.7ms TimeCoverageRelationStatistics Valid=730, Invalid=33680, Unknown=0, NotChecked=0, Total=34410 [2021-05-02 23:54:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 23:54:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-05-02 23:54:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0054054054054054) internal successors, (186), 185 states have internal predecessors, (186), 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 23:54:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2021-05-02 23:54:24,562 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2021-05-02 23:54:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:24,562 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2021-05-02 23:54:24,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 95 states have (on average 1.9263157894736842) internal successors, (183), 94 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2021-05-02 23:54:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 23:54:24,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:24,563 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:24,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:54:24,563 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1848648702, now seen corresponding path program 89 times [2021-05-02 23:54:24,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:24,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247213303] [2021-05-02 23:54:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:24,569 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4365 1000000) InVars {main_~i~0=v_main_~i~0_4365} OutVars{main_~i~0=v_main_~i~0_4365} AuxVars[] AssignedVars[] [2021-05-02 23:54:24,579 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:54:24,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:24,598 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:54:24,609 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:54:24,627 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:24,629 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4367 999999) InVars {main_~i~0=v_main_~i~0_4367} OutVars{main_~i~0=v_main_~i~0_4367} AuxVars[] AssignedVars[] [2021-05-02 23:54:24,631 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:54:24,642 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:24,650 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:54:24,661 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:54:24,676 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:54:30,784 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:30,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247213303] [2021-05-02 23:54:30,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247213303] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:30,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:30,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:54:30,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052945382] [2021-05-02 23:54:30,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:54:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:54:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:54:30,786 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand has 97 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 95 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:46,303 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-02 23:54:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:54:46,305 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 95 states have internal predecessors, (185), 2 states have call successors, (3), 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 189 [2021-05-02 23:54:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:46,306 INFO L225 Difference]: With dead ends: 198 [2021-05-02 23:54:46,306 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 23:54:46,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 69 SyntacticMatches, 24 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4238 ImplicationChecksByTransitivity, 12433.2ms TimeCoverageRelationStatistics Valid=738, Invalid=34418, Unknown=0, NotChecked=0, Total=35156 [2021-05-02 23:54:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 23:54:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 23:54:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0053475935828877) internal successors, (188), 187 states have internal predecessors, (188), 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 23:54:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2021-05-02 23:54:46,358 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2021-05-02 23:54:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:46,358 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2021-05-02 23:54:46,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 95 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2021-05-02 23:54:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 23:54:46,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:46,359 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:46,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:54:46,359 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash -463062564, now seen corresponding path program 90 times [2021-05-02 23:54:46,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:46,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067175177] [2021-05-02 23:54:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:46,365 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4459 1000000) InVars {main_~i~0=v_main_~i~0_4459} OutVars{main_~i~0=v_main_~i~0_4459} AuxVars[] AssignedVars[] [2021-05-02 23:54:46,366 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:54:46,375 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,381 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:54:46,390 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:54:46,405 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:46,406 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4461 999999) InVars {main_~i~0=v_main_~i~0_4461} OutVars{main_~i~0=v_main_~i~0_4461} AuxVars[] AssignedVars[] [2021-05-02 23:54:46,408 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:54:46,417 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,422 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:54:46,431 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:54:46,446 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:46,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:54:52,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:52,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067175177] [2021-05-02 23:54:52,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067175177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:52,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:52,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:54:52,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479625473] [2021-05-02 23:54:52,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:54:52,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:54:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:54:52,823 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 98 states, 97 states have (on average 1.9278350515463918) internal successors, (187), 96 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:10,498 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-02 23:55:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:55:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.9278350515463918) internal successors, (187), 96 states have internal predecessors, (187), 2 states have call successors, (3), 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 191 [2021-05-02 23:55:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:10,500 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:55:10,500 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 23:55:10,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 70 SyntacticMatches, 24 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4330 ImplicationChecksByTransitivity, 13352.5ms TimeCoverageRelationStatistics Valid=746, Invalid=35164, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 23:55:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 23:55:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-05-02 23:55:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2021-05-02 23:55:10,560 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2021-05-02 23:55:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:10,561 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2021-05-02 23:55:10,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 97 states have (on average 1.9278350515463918) internal successors, (187), 96 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2021-05-02 23:55:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 23:55:10,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:10,562 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:10,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:55:10,562 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1519497158, now seen corresponding path program 91 times [2021-05-02 23:55:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:10,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369071688] [2021-05-02 23:55:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:10,569 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4554 1000000) InVars {main_~i~0=v_main_~i~0_4554} OutVars{main_~i~0=v_main_~i~0_4554} AuxVars[] AssignedVars[] [2021-05-02 23:55:10,571 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:55:10,589 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:10,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:55:10,604 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:55:10,620 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:10,622 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4556 999999) InVars {main_~i~0=v_main_~i~0_4556} OutVars{main_~i~0=v_main_~i~0_4556} AuxVars[] AssignedVars[] [2021-05-02 23:55:10,623 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:55:10,632 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:10,642 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:55:10,650 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:55:10,664 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:10,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:55:18,896 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369071688] [2021-05-02 23:55:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369071688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:18,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:18,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:55:18,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877186088] [2021-05-02 23:55:18,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:55:18,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:55:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:55:18,898 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 99 states, 98 states have (on average 1.9285714285714286) internal successors, (189), 97 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:37,423 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-02 23:55:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:55:37,425 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 1.9285714285714286) internal successors, (189), 97 states have internal predecessors, (189), 2 states have call successors, (3), 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 193 [2021-05-02 23:55:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:37,426 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:55:37,426 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 23:55:37,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 65 SyntacticMatches, 30 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4435 ImplicationChecksByTransitivity, 15546.3ms TimeCoverageRelationStatistics Valid=754, Invalid=35918, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 23:55:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 23:55:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-02 23:55:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2021-05-02 23:55:37,487 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2021-05-02 23:55:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:37,488 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2021-05-02 23:55:37,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 98 states have (on average 1.9285714285714286) internal successors, (189), 97 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2021-05-02 23:55:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 23:55:37,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:37,489 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:37,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:55:37,489 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1154107160, now seen corresponding path program 92 times [2021-05-02 23:55:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:37,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170926993] [2021-05-02 23:55:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:37,521 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4650 1000000) InVars {main_~i~0=v_main_~i~0_4650} OutVars{main_~i~0=v_main_~i~0_4650} AuxVars[] AssignedVars[] [2021-05-02 23:55:37,526 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:55:37,602 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,611 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:55:37,623 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:55:37,642 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:37,644 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4652 999999) InVars {main_~i~0=v_main_~i~0_4652} OutVars{main_~i~0=v_main_~i~0_4652} AuxVars[] AssignedVars[] [2021-05-02 23:55:37,646 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:55:37,659 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:55:37,678 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:55:37,697 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:37,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:37,799 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 23:55:45,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:45,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170926993] [2021-05-02 23:55:45,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [170926993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:45,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:45,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:55:45,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470044962] [2021-05-02 23:55:45,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:55:45,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:55:45,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9804, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:55:45,397 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand has 100 states, 99 states have (on average 1.9292929292929293) internal successors, (191), 98 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:05,295 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-05-02 23:56:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:56:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.9292929292929293) internal successors, (191), 98 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2021-05-02 23:56:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:05,297 INFO L225 Difference]: With dead ends: 204 [2021-05-02 23:56:05,297 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 23:56:05,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 73 SyntacticMatches, 23 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 15492.3ms TimeCoverageRelationStatistics Valid=762, Invalid=36680, Unknown=0, NotChecked=0, Total=37442 [2021-05-02 23:56:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 23:56:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-05-02 23:56:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 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 23:56:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2021-05-02 23:56:05,354 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2021-05-02 23:56:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:05,355 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2021-05-02 23:56:05,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 99 states have (on average 1.9292929292929293) internal successors, (191), 98 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2021-05-02 23:56:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 23:56:05,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:05,356 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:05,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:56:05,356 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2097413750, now seen corresponding path program 93 times [2021-05-02 23:56:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:05,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592454124] [2021-05-02 23:56:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:05,369 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4747 1000000) InVars {main_~i~0=v_main_~i~0_4747} OutVars{main_~i~0=v_main_~i~0_4747} AuxVars[] AssignedVars[] [2021-05-02 23:56:05,372 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:56:05,384 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:05,393 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:56:05,404 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:56:05,424 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:05,426 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4749 999999) InVars {main_~i~0=v_main_~i~0_4749} OutVars{main_~i~0=v_main_~i~0_4749} AuxVars[] AssignedVars[] [2021-05-02 23:56:05,427 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:56:05,438 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:05,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:56:05,454 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:56:05,480 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:05,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:05,559 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 23:56:13,892 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:13,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592454124] [2021-05-02 23:56:13,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592454124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:13,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:13,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:56:13,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803942910] [2021-05-02 23:56:13,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:56:13,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:56:13,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=10003, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:56:13,894 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 101 states, 100 states have (on average 1.93) internal successors, (193), 99 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:35,238 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-05-02 23:56:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:56:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.93) internal successors, (193), 99 states have internal predecessors, (193), 2 states have call successors, (3), 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 197 [2021-05-02 23:56:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:35,240 INFO L225 Difference]: With dead ends: 206 [2021-05-02 23:56:35,240 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 23:56:35,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 70 SyntacticMatches, 27 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4618 ImplicationChecksByTransitivity, 16612.8ms TimeCoverageRelationStatistics Valid=770, Invalid=37450, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 23:56:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 23:56:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-05-02 23:56:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 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 23:56:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2021-05-02 23:56:35,298 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2021-05-02 23:56:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:35,298 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2021-05-02 23:56:35,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 100 states have (on average 1.93) internal successors, (193), 99 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2021-05-02 23:56:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 23:56:35,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:35,302 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:35,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:56:35,302 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:35,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1918020012, now seen corresponding path program 94 times [2021-05-02 23:56:35,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:35,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062387910] [2021-05-02 23:56:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:35,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4845 1000000) InVars {main_~i~0=v_main_~i~0_4845} OutVars{main_~i~0=v_main_~i~0_4845} AuxVars[] AssignedVars[] [2021-05-02 23:56:35,311 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:56:35,321 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:35,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:56:35,346 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:56:35,366 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:35,368 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4847 999999) InVars {main_~i~0=v_main_~i~0_4847} OutVars{main_~i~0=v_main_~i~0_4847} AuxVars[] AssignedVars[] [2021-05-02 23:56:35,369 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:56:35,371 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:35,380 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:56:35,399 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:56:35,417 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:35,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:56:44,118 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062387910] [2021-05-02 23:56:44,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062387910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:44,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:44,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:56:44,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030123773] [2021-05-02 23:56:44,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:56:44,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:56:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=10204, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:56:44,124 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 102 states, 101 states have (on average 1.9306930693069306) internal successors, (195), 100 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:05,342 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-05-02 23:57:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:57:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.9306930693069306) internal successors, (195), 100 states have internal predecessors, (195), 2 states have call successors, (3), 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 199 [2021-05-02 23:57:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:05,344 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:57:05,344 INFO L226 Difference]: Without dead ends: 203 [2021-05-02 23:57:05,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 70 SyntacticMatches, 28 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 16712.9ms TimeCoverageRelationStatistics Valid=778, Invalid=38228, Unknown=0, NotChecked=0, Total=39006 [2021-05-02 23:57:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-02 23:57:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-05-02 23:57:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0050761421319796) internal successors, (198), 197 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2021-05-02 23:57:05,414 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2021-05-02 23:57:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:05,414 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2021-05-02 23:57:05,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 101 states have (on average 1.9306930693069306) internal successors, (195), 100 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2021-05-02 23:57:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-05-02 23:57:05,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:05,415 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:05,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:57:05,415 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:05,416 INFO L82 PathProgramCache]: Analyzing trace with hash 425733810, now seen corresponding path program 95 times [2021-05-02 23:57:05,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:05,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120698514] [2021-05-02 23:57:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:05,430 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4944 1000000) InVars {main_~i~0=v_main_~i~0_4944} OutVars{main_~i~0=v_main_~i~0_4944} AuxVars[] AssignedVars[] [2021-05-02 23:57:05,432 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:57:05,433 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:05,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:57:05,467 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:57:05,489 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:05,491 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4946 999999) InVars {main_~i~0=v_main_~i~0_4946} OutVars{main_~i~0=v_main_~i~0_4946} AuxVars[] AssignedVars[] [2021-05-02 23:57:05,494 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-02 23:57:05,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:05,506 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:57:05,531 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-02 23:57:05,552 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:05,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:57:14,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120698514] [2021-05-02 23:57:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1120698514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:14,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:14,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:57:14,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539913587] [2021-05-02 23:57:14,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:57:14,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:57:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=10407, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:57:14,540 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand has 103 states, 102 states have (on average 1.9313725490196079) internal successors, (197), 101 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)