/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-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:31:44,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:31:44,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:31:44,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:31:44,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:31:44,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:31:44,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:31:44,513 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 23:31:44,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:31:44,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:31:44,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:31:44,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:31:44,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:31:44,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:31:44,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:31:44,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:31:44,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:31:44,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:31:44,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:31:44,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:31:44,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:31:44,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:31:44,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:31:44,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:31:44,534 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:31:44,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:31:44,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:31:44,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:31:44,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:31:44,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:31:44,827 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:31:44,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2021-05-02 23:31:44,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2fda802/3df5accdd8ae42a18bdba737985829ee/FLAG77ac57a89 [2021-05-02 23:31:45,183 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:31:45,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2021-05-02 23:31:45,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2fda802/3df5accdd8ae42a18bdba737985829ee/FLAG77ac57a89 [2021-05-02 23:31:45,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2fda802/3df5accdd8ae42a18bdba737985829ee [2021-05-02 23:31:45,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:31:45,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:31:45,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:31:45,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:31:45,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:31:45,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f58d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45, skipping insertion in model container [2021-05-02 23:31:45,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:31:45,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:31:45,736 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-invgen/seq-3.i[893,906] [2021-05-02 23:31:45,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:31:45,763 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:31:45,773 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-invgen/seq-3.i[893,906] [2021-05-02 23:31:45,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:31:45,797 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:31:45,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45 WrapperNode [2021-05-02 23:31:45,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:31:45,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:31:45,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:31:45,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:31:45,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (1/1) ... [2021-05-02 23:31:45,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:31:45,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:31:45,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:31:45,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:31:45,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (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 23:31:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:31:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:31:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:31:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:31:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:31:45,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:31:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:31:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:31:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:31:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:31:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:31:45,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:31:45,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:31:45,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:31:45,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:31:45,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:31:46,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:31:46,224 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 23:31:46,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:31:46 BoogieIcfgContainer [2021-05-02 23:31:46,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:31:46,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:31:46,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:31:46,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:31:46,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:31:45" (1/3) ... [2021-05-02 23:31:46,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464b6ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:31:46, skipping insertion in model container [2021-05-02 23:31:46,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:31:45" (2/3) ... [2021-05-02 23:31:46,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464b6ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:31:46, skipping insertion in model container [2021-05-02 23:31:46,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:31:46" (3/3) ... [2021-05-02 23:31:46,245 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.i [2021-05-02 23:31:46,249 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:31:46,252 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:31:46,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:31:46,284 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:31:46,284 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:31:46,284 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:31:46,284 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:31:46,284 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:31:46,284 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:31:46,284 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:31:46,284 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:31:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 23:31:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:31:46,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:46,299 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:46,299 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1545358454, now seen corresponding path program 1 times [2021-05-02 23:31:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911259006] [2021-05-02 23:31:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:46,356 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:46,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:46,535 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:46,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911259006] [2021-05-02 23:31:46,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911259006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:46,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:46,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:31:46,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663609341] [2021-05-02 23:31:46,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:31:46,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:31:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:31:46,562 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 23:31:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:46,645 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2021-05-02 23:31:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:31:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 23:31:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:46,651 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:31:46,651 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:31:46,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:31:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:31:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 23:31:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-02 23:31:46,708 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-05-02 23:31:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:46,708 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-02 23:31:46,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 23:31:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-02 23:31:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:31:46,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:46,709 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:46,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:31:46,709 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1389492102, now seen corresponding path program 1 times [2021-05-02 23:31:46,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:46,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526019172] [2021-05-02 23:31:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:46,725 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:46,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:46,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:46,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526019172] [2021-05-02 23:31:46,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [526019172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:46,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:46,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:31:46,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412421363] [2021-05-02 23:31:46,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:31:46,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:31:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:31:46,899 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 23:31:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:47,194 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-05-02 23:31:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:31:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 23:31:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:47,196 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:31:47,196 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:31:47,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:31:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:31:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-05-02 23:31:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 23:31:47,205 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 23:31:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:47,205 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 23:31:47,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 23:31:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 23:31:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:31:47,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:47,206 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:47,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:31:47,206 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:47,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1362943620, now seen corresponding path program 1 times [2021-05-02 23:31:47,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:47,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190195006] [2021-05-02 23:31:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:47,275 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_6 v_main_~n0~0_10) InVars {main_~i0~0=v_main_~i0~0_6, main_~n0~0=v_main_~n0~0_10} OutVars{main_~i0~0=v_main_~i0~0_6, main_~n0~0=v_main_~n0~0_10} AuxVars[] AssignedVars[] [2021-05-02 23:31:47,300 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:47,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:47,329 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:47,371 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:47,391 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:47,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:47,629 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190195006] [2021-05-02 23:31:47,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190195006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:47,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:47,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:31:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108898659] [2021-05-02 23:31:47,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:31:47,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:31:47,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:31:47,634 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:31:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:48,216 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-05-02 23:31:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:31:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:31:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:48,218 INFO L225 Difference]: With dead ends: 45 [2021-05-02 23:31:48,218 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:31:48,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:31:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:31:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-05-02 23:31:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 23:31:48,225 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2021-05-02 23:31:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:48,226 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 23:31:48,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:31:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 23:31:48,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:31:48,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:48,226 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:48,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:31:48,226 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash 813532579, now seen corresponding path program 1 times [2021-05-02 23:31:48,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:48,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942087424] [2021-05-02 23:31:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:48,233 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_10 v_main_~n0~0_11) InVars {main_~i0~0=v_main_~i0~0_10, main_~n0~0=v_main_~n0~0_11} OutVars{main_~i0~0=v_main_~i0~0_10, main_~n0~0=v_main_~n0~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:31:48,237 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:48,249 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:48,255 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:48,266 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:48,279 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:48,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:48,476 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:48,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942087424] [2021-05-02 23:31:48,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942087424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:48,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:48,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:31:48,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194924708] [2021-05-02 23:31:48,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:31:48,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:31:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:31:48,478 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:49,055 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-05-02 23:31:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:31:49,055 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-05-02 23:31:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:49,056 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:31:49,056 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:31:49,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:31:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:31:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-05-02 23:31:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-05-02 23:31:49,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2021-05-02 23:31:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:49,062 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-05-02 23:31:49,062 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-05-02 23:31:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:31:49,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:49,063 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:49,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:31:49,063 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 21739812, now seen corresponding path program 1 times [2021-05-02 23:31:49,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:49,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345807329] [2021-05-02 23:31:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:49,068 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i1~0_6 v_main_~n1~0_10) InVars {main_~n1~0=v_main_~n1~0_10, main_~i1~0=v_main_~i1~0_6} OutVars{main_~n1~0=v_main_~n1~0_10, main_~i1~0=v_main_~i1~0_6} AuxVars[] AssignedVars[] [2021-05-02 23:31:49,071 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:49,082 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:49,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:49,097 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:49,111 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:49,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:49,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:49,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345807329] [2021-05-02 23:31:49,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [345807329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:49,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:49,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:31:49,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663798240] [2021-05-02 23:31:49,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:31:49,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:49,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:31:49,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:31:49,291 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:49,754 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 23:31:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:31:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-05-02 23:31:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:49,756 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:31:49,756 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:31:49,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:31:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:31:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 23:31:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 23:31:49,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2021-05-02 23:31:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:49,761 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 23:31:49,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 23:31:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:31:49,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:49,762 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:49,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:31:49,762 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1131901279, now seen corresponding path program 2 times [2021-05-02 23:31:49,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:49,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788415411] [2021-05-02 23:31:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:49,766 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_14 v_main_~n0~0_12) InVars {main_~i0~0=v_main_~i0~0_14, main_~n0~0=v_main_~n0~0_12} OutVars{main_~i0~0=v_main_~i0~0_14, main_~n0~0=v_main_~n0~0_12} AuxVars[] AssignedVars[] [2021-05-02 23:31:49,769 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:49,780 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:49,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:49,794 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:49,807 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:49,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:49,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:50,008 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788415411] [2021-05-02 23:31:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788415411] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:50,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:50,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:31:50,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561907519] [2021-05-02 23:31:50,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:31:50,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:31:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:31:50,010 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:50,791 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-05-02 23:31:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:31:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-05-02 23:31:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:50,792 INFO L225 Difference]: With dead ends: 57 [2021-05-02 23:31:50,792 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:31:50,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:31:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:31:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-05-02 23:31:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 23:31:50,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2021-05-02 23:31:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:50,797 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 23:31:50,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 23:31:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:31:50,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:50,798 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:50,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:31:50,798 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1923694046, now seen corresponding path program 1 times [2021-05-02 23:31:50,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:50,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469072651] [2021-05-02 23:31:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:50,802 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_19 v_main_~n0~0_13) InVars {main_~i0~0=v_main_~i0~0_19, main_~n0~0=v_main_~n0~0_13} OutVars{main_~i0~0=v_main_~i0~0_19, main_~n0~0=v_main_~n0~0_13} AuxVars[] AssignedVars[] [2021-05-02 23:31:50,804 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:50,805 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:50,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:50,829 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:50,841 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:50,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:50,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:31:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:50,966 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 23:31:51,029 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:51,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469072651] [2021-05-02 23:31:51,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [469072651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:51,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:51,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:31:51,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073848007] [2021-05-02 23:31:51,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:31:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:31:51,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:31:51,030 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:51,652 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-05-02 23:31:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:31:51,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-05-02 23:31:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:51,653 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:31:51,653 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:31:51,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:31:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:31:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 23:31:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 23:31:51,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2021-05-02 23:31:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:51,659 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 23:31:51,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 23:31:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:31:51,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:51,660 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:51,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:31:51,660 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1310808733, now seen corresponding path program 3 times [2021-05-02 23:31:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:51,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11381280] [2021-05-02 23:31:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:51,664 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_23 v_main_~n0~0_14) InVars {main_~i0~0=v_main_~i0~0_23, main_~n0~0=v_main_~n0~0_14} OutVars{main_~i0~0=v_main_~i0~0_23, main_~n0~0=v_main_~n0~0_14} AuxVars[] AssignedVars[] [2021-05-02 23:31:51,666 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:51,676 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:51,681 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:51,690 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:51,702 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:51,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:51,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:51,899 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11381280] [2021-05-02 23:31:51,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [11381280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:51,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:51,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:31:51,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623145039] [2021-05-02 23:31:51,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:31:51,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:31:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:31:51,900 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:52,657 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-05-02 23:31:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:31:52,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 23:31:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:52,658 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:31:52,658 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:31:52,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:31:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:31:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-05-02 23:31:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 23:31:52,663 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2021-05-02 23:31:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:52,664 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 23:31:52,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 23:31:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:31:52,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:52,664 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:52,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:31:52,664 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2102601500, now seen corresponding path program 2 times [2021-05-02 23:31:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:52,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482076020] [2021-05-02 23:31:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:52,668 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_29 v_main_~n0~0_15) InVars {main_~i0~0=v_main_~i0~0_29, main_~n0~0=v_main_~n0~0_15} OutVars{main_~i0~0=v_main_~i0~0_29, main_~n0~0=v_main_~n0~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:31:52,670 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:52,680 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:52,685 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:52,693 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:52,705 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:52,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:52,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:31:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:52,902 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:52,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482076020] [2021-05-02 23:31:52,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482076020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:52,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:52,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:31:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035029944] [2021-05-02 23:31:52,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:31:52,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:31:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:31:52,904 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:53,457 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-05-02 23:31:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:31:53,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 23:31:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:53,458 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:31:53,458 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:31:53,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 545.0ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:31:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:31:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 23:31:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 23:31:53,462 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2021-05-02 23:31:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:53,462 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 23:31:53,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 23:31:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:31:53,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:53,463 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:53,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:31:53,463 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1732994785, now seen corresponding path program 4 times [2021-05-02 23:31:53,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:53,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116905026] [2021-05-02 23:31:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:53,467 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_34 v_main_~n0~0_16) InVars {main_~i0~0=v_main_~i0~0_34, main_~n0~0=v_main_~n0~0_16} OutVars{main_~i0~0=v_main_~i0~0_34, main_~n0~0=v_main_~n0~0_16} AuxVars[] AssignedVars[] [2021-05-02 23:31:53,468 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:53,478 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:53,483 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:53,491 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:53,504 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:53,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:53,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:53,731 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116905026] [2021-05-02 23:31:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116905026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:53,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:53,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:31:53,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993363411] [2021-05-02 23:31:53,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:31:53,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:53,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:31:53,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:31:53,732 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:54,509 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-05-02 23:31:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:31:54,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-05-02 23:31:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:54,509 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:31:54,509 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:31:54,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 782.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:31:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:31:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-05-02 23:31:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 23:31:54,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 28 [2021-05-02 23:31:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:54,514 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 23:31:54,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 23:31:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:31:54,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:54,515 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:54,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:31:54,515 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash 941202018, now seen corresponding path program 3 times [2021-05-02 23:31:54,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:54,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703028777] [2021-05-02 23:31:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:54,518 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_41 v_main_~n0~0_17) InVars {main_~i0~0=v_main_~i0~0_41, main_~n0~0=v_main_~n0~0_17} OutVars{main_~i0~0=v_main_~i0~0_41, main_~n0~0=v_main_~n0~0_17} AuxVars[] AssignedVars[] [2021-05-02 23:31:54,520 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:54,521 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:54,525 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:54,543 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:54,556 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:54,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:54,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:31:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:54,662 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 23:31:54,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:54,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703028777] [2021-05-02 23:31:54,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703028777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:54,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:54,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:31:54,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799546860] [2021-05-02 23:31:54,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:31:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:31:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:31:54,757 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:55,396 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-05-02 23:31:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:31:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-05-02 23:31:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:55,397 INFO L225 Difference]: With dead ends: 51 [2021-05-02 23:31:55,397 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:31:55,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:31:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:31:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 23:31:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 23:31:55,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2021-05-02 23:31:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:55,402 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 23:31:55,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 23:31:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:31:55,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:55,402 INFO L523 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:55,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:31:55,402 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1601623331, now seen corresponding path program 5 times [2021-05-02 23:31:55,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:55,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260801172] [2021-05-02 23:31:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:55,406 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_47 v_main_~n0~0_18) InVars {main_~i0~0=v_main_~i0~0_47, main_~n0~0=v_main_~n0~0_18} OutVars{main_~i0~0=v_main_~i0~0_47, main_~n0~0=v_main_~n0~0_18} AuxVars[] AssignedVars[] [2021-05-02 23:31:55,408 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:55,418 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:55,423 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:55,432 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:55,445 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:55,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:55,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:55,543 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 23:31:55,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:55,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260801172] [2021-05-02 23:31:55,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1260801172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:55,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:55,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:31:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729351579] [2021-05-02 23:31:55,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:31:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:31:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:31:55,675 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:56,547 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-05-02 23:31:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:31:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-05-02 23:31:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:56,548 INFO L225 Difference]: With dead ends: 57 [2021-05-02 23:31:56,548 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:31:56,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 838.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:31:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:31:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-05-02 23:31:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 23:31:56,553 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2021-05-02 23:31:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:56,553 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 23:31:56,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 23:31:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:31:56,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:56,554 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:56,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:31:56,554 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 809830564, now seen corresponding path program 4 times [2021-05-02 23:31:56,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:56,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812591585] [2021-05-02 23:31:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:56,558 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_55 v_main_~n0~0_19) InVars {main_~i0~0=v_main_~i0~0_55, main_~n0~0=v_main_~n0~0_19} OutVars{main_~i0~0=v_main_~i0~0_55, main_~n0~0=v_main_~n0~0_19} AuxVars[] AssignedVars[] [2021-05-02 23:31:56,559 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:56,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:56,564 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:56,581 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:56,594 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:56,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:31:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:56,834 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:56,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812591585] [2021-05-02 23:31:56,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812591585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:56,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:56,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:31:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753519973] [2021-05-02 23:31:56,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:31:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:31:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:31:56,835 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:57,372 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-02 23:31:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:31:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-05-02 23:31:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:57,373 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:31:57,373 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:31:57,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:31:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:31:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 23:31:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:31:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 23:31:57,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2021-05-02 23:31:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:57,379 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 23:31:57,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:31:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 23:31:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:31:57,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:57,379 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:57,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:31:57,379 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash -973621373, now seen corresponding path program 5 times [2021-05-02 23:31:57,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:57,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239221011] [2021-05-02 23:31:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:57,383 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_62 v_main_~n0~0_20) InVars {main_~i0~0=v_main_~i0~0_62, main_~n0~0=v_main_~n0~0_20} OutVars{main_~i0~0=v_main_~i0~0_62, main_~n0~0=v_main_~n0~0_20} AuxVars[] AssignedVars[] [2021-05-02 23:31:57,384 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:57,385 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:57,389 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:57,407 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:57,419 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:57,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:57,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:31:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:57,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:31:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:57,661 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239221011] [2021-05-02 23:31:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239221011] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:31:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780634234] [2021-05-02 23:31:57,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:31:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:31:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:31:57,662 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:58,317 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-05-02 23:31:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:31:58,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-05-02 23:31:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:58,319 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:31:58,319 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:31:58,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:31:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:31:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 23:31:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:31:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 23:31:58,325 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2021-05-02 23:31:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:58,325 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 23:31:58,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 23:31:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:31:58,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:58,325 INFO L523 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:58,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:31:58,325 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2069906842, now seen corresponding path program 6 times [2021-05-02 23:31:58,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:58,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501724374] [2021-05-02 23:31:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:58,329 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_69 v_main_~n0~0_21) InVars {main_~i0~0=v_main_~i0~0_69, main_~n0~0=v_main_~n0~0_21} OutVars{main_~i0~0=v_main_~i0~0_69, main_~n0~0=v_main_~n0~0_21} AuxVars[] AssignedVars[] [2021-05-02 23:31:58,330 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:58,340 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:58,345 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:58,354 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:58,366 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:58,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:58,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:31:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:58,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:31:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:58,648 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:58,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501724374] [2021-05-02 23:31:58,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [501724374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:58,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:58,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:31:58,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793472625] [2021-05-02 23:31:58,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:31:58,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:58,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:31:58,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:31:58,649 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:59,525 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-05-02 23:31:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:31:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-05-02 23:31:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:59,526 INFO L225 Difference]: With dead ends: 69 [2021-05-02 23:31:59,526 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:31:59,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 900.4ms TimeCoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:31:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:31:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-05-02 23:31:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:31:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 23:31:59,532 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 37 [2021-05-02 23:31:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:59,532 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 23:31:59,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:31:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 23:31:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:31:59,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:59,532 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:59,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:31:59,533 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 75088837, now seen corresponding path program 6 times [2021-05-02 23:31:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159371243] [2021-05-02 23:31:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:59,536 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_78 v_main_~n0~0_22) InVars {main_~i0~0=v_main_~i0~0_78, main_~n0~0=v_main_~n0~0_22} OutVars{main_~i0~0=v_main_~i0~0_78, main_~n0~0=v_main_~n0~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:31:59,537 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:31:59,538 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:59,542 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:31:59,559 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:31:59,576 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:59,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:31:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:59,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:31:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:59,839 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159371243] [2021-05-02 23:31:59,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159371243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:59,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:59,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:31:59,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129809190] [2021-05-02 23:31:59,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:31:59,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:59,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:31:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:31:59,840 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:00,543 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-02 23:32:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:32:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-05-02 23:32:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:00,544 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:32:00,544 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:32:00,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:32:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:32:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 23:32:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 23:32:00,549 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2021-05-02 23:32:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:00,549 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 23:32:00,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 23:32:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:32:00,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:00,550 INFO L523 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:00,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:32:00,550 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 375338596, now seen corresponding path program 7 times [2021-05-02 23:32:00,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:00,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426825015] [2021-05-02 23:32:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:00,553 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_86 v_main_~n0~0_23) InVars {main_~i0~0=v_main_~i0~0_86, main_~n0~0=v_main_~n0~0_23} OutVars{main_~i0~0=v_main_~i0~0_86, main_~n0~0=v_main_~n0~0_23} AuxVars[] AssignedVars[] [2021-05-02 23:32:00,555 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:00,565 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:00,569 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:00,578 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:00,590 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:00,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:00,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:00,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:00,909 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:00,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426825015] [2021-05-02 23:32:00,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [426825015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:00,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:00,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:32:00,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297989455] [2021-05-02 23:32:00,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:32:00,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:32:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:32:00,910 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:01,848 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-05-02 23:32:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:32:01,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2021-05-02 23:32:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:01,849 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:32:01,849 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:32:01,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 951.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:32:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:32:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-05-02 23:32:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 23:32:01,854 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 38 [2021-05-02 23:32:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:01,854 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 23:32:01,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 23:32:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:32:01,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:01,855 INFO L523 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:01,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:32:01,855 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:01,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1774633021, now seen corresponding path program 7 times [2021-05-02 23:32:01,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:01,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96518786] [2021-05-02 23:32:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:01,858 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_96 v_main_~n0~0_24) InVars {main_~i0~0=v_main_~i0~0_96, main_~n0~0=v_main_~n0~0_24} OutVars{main_~i0~0=v_main_~i0~0_96, main_~n0~0=v_main_~n0~0_24} AuxVars[] AssignedVars[] [2021-05-02 23:32:01,859 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:01,860 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:01,864 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:01,882 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:01,894 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:02,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:02,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:02,193 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:02,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96518786] [2021-05-02 23:32:02,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [96518786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:02,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:02,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:32:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473923835] [2021-05-02 23:32:02,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:32:02,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:32:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:32:02,195 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:02,949 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-05-02 23:32:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:32:02,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2021-05-02 23:32:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:02,950 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:32:02,950 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:32:02,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 799.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:32:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:32:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 23:32:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 23:32:02,956 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2021-05-02 23:32:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:02,956 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 23:32:02,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 23:32:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:32:02,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:02,956 INFO L523 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:02,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:32:02,956 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1131464154, now seen corresponding path program 8 times [2021-05-02 23:32:02,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:02,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662832282] [2021-05-02 23:32:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:02,960 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_105 v_main_~n0~0_25) InVars {main_~i0~0=v_main_~i0~0_105, main_~n0~0=v_main_~n0~0_25} OutVars{main_~i0~0=v_main_~i0~0_105, main_~n0~0=v_main_~n0~0_25} AuxVars[] AssignedVars[] [2021-05-02 23:32:02,961 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:02,962 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:02,966 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:02,985 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:02,997 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:03,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:03,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:03,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:03,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662832282] [2021-05-02 23:32:03,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662832282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:03,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:03,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:32:03,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227932248] [2021-05-02 23:32:03,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:32:03,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:03,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:32:03,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:32:03,321 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:04,330 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-05-02 23:32:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:32:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-05-02 23:32:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:04,331 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:32:04,331 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:32:04,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1012.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:32:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:32:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-05-02 23:32:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 23:32:04,342 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2021-05-02 23:32:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:04,342 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 23:32:04,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 23:32:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:32:04,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:04,342 INFO L523 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:04,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:32:04,343 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1013531525, now seen corresponding path program 8 times [2021-05-02 23:32:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:04,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667006984] [2021-05-02 23:32:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:04,346 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_116 v_main_~n0~0_26) InVars {main_~i0~0=v_main_~i0~0_116, main_~n0~0=v_main_~n0~0_26} OutVars{main_~i0~0=v_main_~i0~0_116, main_~n0~0=v_main_~n0~0_26} AuxVars[] AssignedVars[] [2021-05-02 23:32:04,347 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:04,357 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:04,362 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:04,370 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:04,382 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:04,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:04,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:04,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:04,691 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667006984] [2021-05-02 23:32:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667006984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:04,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:32:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640959344] [2021-05-02 23:32:04,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:32:04,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:32:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:32:04,692 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:05,493 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-05-02 23:32:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:32:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-05-02 23:32:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:05,494 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:32:05,494 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:32:05,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:32:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:32:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 23:32:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-02 23:32:05,500 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 39 [2021-05-02 23:32:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:05,500 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-02 23:32:05,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-02 23:32:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:32:05,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:05,501 INFO L523 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:05,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:32:05,501 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash -597709148, now seen corresponding path program 9 times [2021-05-02 23:32:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:05,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363722623] [2021-05-02 23:32:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:05,504 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_126 v_main_~n0~0_27) InVars {main_~i0~0=v_main_~i0~0_126, main_~n0~0=v_main_~n0~0_27} OutVars{main_~i0~0=v_main_~i0~0_126, main_~n0~0=v_main_~n0~0_27} AuxVars[] AssignedVars[] [2021-05-02 23:32:05,505 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:05,506 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:05,511 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:05,528 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:05,541 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:05,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:05,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:05,878 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:05,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363722623] [2021-05-02 23:32:05,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [363722623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:05,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:05,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:32:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037429361] [2021-05-02 23:32:05,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:32:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:32:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:32:05,879 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:06,970 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-05-02 23:32:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:32:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-05-02 23:32:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:06,971 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:32:06,971 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:32:06,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1086.1ms TimeCoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:32:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:32:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-05-02 23:32:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 23:32:06,976 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 40 [2021-05-02 23:32:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:06,976 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 23:32:06,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 23:32:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:32:06,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:06,977 INFO L523 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:06,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:32:06,977 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1547286531, now seen corresponding path program 9 times [2021-05-02 23:32:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:06,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119980995] [2021-05-02 23:32:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:06,980 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_138 v_main_~n0~0_28) InVars {main_~i0~0=v_main_~i0~0_138, main_~n0~0=v_main_~n0~0_28} OutVars{main_~i0~0=v_main_~i0~0_138, main_~n0~0=v_main_~n0~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:32:06,981 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:06,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:06,996 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:07,004 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:07,017 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:07,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:07,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:07,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:07,359 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:07,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119980995] [2021-05-02 23:32:07,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119980995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:07,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:07,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:32:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086778950] [2021-05-02 23:32:07,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:32:07,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:07,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:32:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:32:07,360 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:08,162 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-05-02 23:32:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:32:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-05-02 23:32:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:08,163 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:32:08,163 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:32:08,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 859.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:32:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:32:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 23:32:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-05-02 23:32:08,169 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2021-05-02 23:32:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:08,169 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-05-02 23:32:08,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-05-02 23:32:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:32:08,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:08,169 INFO L523 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:08,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:32:08,169 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1231173146, now seen corresponding path program 10 times [2021-05-02 23:32:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:08,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740006279] [2021-05-02 23:32:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:08,173 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_149 v_main_~n0~0_29) InVars {main_~i0~0=v_main_~i0~0_149, main_~n0~0=v_main_~n0~0_29} OutVars{main_~i0~0=v_main_~i0~0_149, main_~n0~0=v_main_~n0~0_29} AuxVars[] AssignedVars[] [2021-05-02 23:32:08,174 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:08,186 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:08,191 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:08,200 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:08,215 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:08,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:08,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:08,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:08,591 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:08,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740006279] [2021-05-02 23:32:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [740006279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:08,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:08,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:32:08,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899225458] [2021-05-02 23:32:08,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:32:08,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:32:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:32:08,592 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:09,606 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-05-02 23:32:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:32:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-05-02 23:32:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:09,608 INFO L225 Difference]: With dead ends: 73 [2021-05-02 23:32:09,608 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:32:09,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1062.8ms TimeCoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:32:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:32:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-05-02 23:32:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 23:32:09,616 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-02 23:32:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:09,616 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 23:32:09,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 23:32:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:32:09,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:09,617 INFO L523 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:09,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:32:09,617 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 913822533, now seen corresponding path program 10 times [2021-05-02 23:32:09,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:09,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928362555] [2021-05-02 23:32:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:09,627 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_162 v_main_~n0~0_30) InVars {main_~i0~0=v_main_~i0~0_162, main_~n0~0=v_main_~n0~0_30} OutVars{main_~i0~0=v_main_~i0~0_162, main_~n0~0=v_main_~n0~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:32:09,649 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:09,673 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:09,678 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:09,686 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:09,699 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:09,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:09,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:09,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:10,130 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:10,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928362555] [2021-05-02 23:32:10,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [928362555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:10,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:10,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:32:10,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304023597] [2021-05-02 23:32:10,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:32:10,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:10,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:32:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:32:10,131 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:10,900 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-05-02 23:32:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:32:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-05-02 23:32:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:10,903 INFO L225 Difference]: With dead ends: 69 [2021-05-02 23:32:10,903 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:32:10,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:32:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:32:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 23:32:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-05-02 23:32:10,911 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-05-02 23:32:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:10,911 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-05-02 23:32:10,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-05-02 23:32:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:32:10,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:10,911 INFO L523 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:10,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:32:10,911 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash 606279396, now seen corresponding path program 11 times [2021-05-02 23:32:10,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:10,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000427887] [2021-05-02 23:32:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:10,921 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_174 v_main_~n0~0_31) InVars {main_~i0~0=v_main_~i0~0_174, main_~n0~0=v_main_~n0~0_31} OutVars{main_~i0~0=v_main_~i0~0_174, main_~n0~0=v_main_~n0~0_31} AuxVars[] AssignedVars[] [2021-05-02 23:32:10,923 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:10,930 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:10,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:10,963 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:10,975 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:11,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:11,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:11,435 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:11,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000427887] [2021-05-02 23:32:11,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000427887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:11,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:11,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:32:11,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337817395] [2021-05-02 23:32:11,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:32:11,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:32:11,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:32:11,436 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:12,513 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-05-02 23:32:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:32:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-05-02 23:32:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:12,513 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:32:12,513 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:32:12,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1183.6ms TimeCoverageRelationStatistics Valid=282, Invalid=2268, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:32:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:32:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-05-02 23:32:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-05-02 23:32:12,521 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 42 [2021-05-02 23:32:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:12,521 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-05-02 23:32:12,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-05-02 23:32:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:32:12,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:12,521 INFO L523 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:12,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:32:12,521 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1543692221, now seen corresponding path program 11 times [2021-05-02 23:32:12,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:12,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186728239] [2021-05-02 23:32:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:12,527 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_188 v_main_~n0~0_32) InVars {main_~i0~0=v_main_~i0~0_188, main_~n0~0=v_main_~n0~0_32} OutVars{main_~i0~0=v_main_~i0~0_188, main_~n0~0=v_main_~n0~0_32} AuxVars[] AssignedVars[] [2021-05-02 23:32:12,529 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:12,529 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:12,534 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:12,553 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:12,574 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:12,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:12,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:12,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:13,049 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:13,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186728239] [2021-05-02 23:32:13,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186728239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:13,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:13,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:32:13,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772093193] [2021-05-02 23:32:13,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:32:13,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:13,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:32:13,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:32:13,051 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:13,961 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-02 23:32:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:32:13,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-05-02 23:32:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:13,962 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:32:13,962 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 23:32:13,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1051.0ms TimeCoverageRelationStatistics Valid=239, Invalid=2017, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:32:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 23:32:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 23:32:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-05-02 23:32:13,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 42 [2021-05-02 23:32:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:13,968 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-05-02 23:32:13,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-05-02 23:32:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:32:13,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:13,969 INFO L523 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:13,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:32:13,969 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1732733350, now seen corresponding path program 12 times [2021-05-02 23:32:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:13,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195798080] [2021-05-02 23:32:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:13,972 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_201 v_main_~n0~0_33) InVars {main_~i0~0=v_main_~i0~0_201, main_~n0~0=v_main_~n0~0_33} OutVars{main_~i0~0=v_main_~i0~0_201, main_~n0~0=v_main_~n0~0_33} AuxVars[] AssignedVars[] [2021-05-02 23:32:13,974 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:13,987 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:13,992 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:14,002 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:14,018 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:14,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:14,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:14,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:14,461 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:14,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195798080] [2021-05-02 23:32:14,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [195798080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:14,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:14,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:32:14,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027618540] [2021-05-02 23:32:14,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:32:14,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:14,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:32:14,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:32:14,463 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:15,661 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-05-02 23:32:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:32:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-05-02 23:32:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:15,662 INFO L225 Difference]: With dead ends: 75 [2021-05-02 23:32:15,662 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:32:15,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:32:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:32:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-05-02 23:32:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-05-02 23:32:15,669 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 43 [2021-05-02 23:32:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:15,669 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-05-02 23:32:15,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-05-02 23:32:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:32:15,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:15,669 INFO L523 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:15,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:32:15,670 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash -417238267, now seen corresponding path program 12 times [2021-05-02 23:32:15,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:15,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142801372] [2021-05-02 23:32:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:15,673 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_216 v_main_~n0~0_34) InVars {main_~i0~0=v_main_~i0~0_216, main_~n0~0=v_main_~n0~0_34} OutVars{main_~i0~0=v_main_~i0~0_216, main_~n0~0=v_main_~n0~0_34} AuxVars[] AssignedVars[] [2021-05-02 23:32:15,675 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:15,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:15,681 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:15,702 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:15,718 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:15,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:15,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:15,861 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 23:32:16,164 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:16,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142801372] [2021-05-02 23:32:16,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2142801372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:16,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:16,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:32:16,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610964963] [2021-05-02 23:32:16,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:32:16,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:32:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:32:16,165 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:17,207 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-05-02 23:32:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:32:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-05-02 23:32:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:17,208 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:32:17,208 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:32:17,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:32:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:32:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 23:32:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-05-02 23:32:17,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2021-05-02 23:32:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:17,214 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-05-02 23:32:17,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-05-02 23:32:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:32:17,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:17,215 INFO L523 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:17,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:32:17,215 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2001899740, now seen corresponding path program 13 times [2021-05-02 23:32:17,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:17,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926291332] [2021-05-02 23:32:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:17,219 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_230 v_main_~n0~0_35) InVars {main_~i0~0=v_main_~i0~0_230, main_~n0~0=v_main_~n0~0_35} OutVars{main_~i0~0=v_main_~i0~0_230, main_~n0~0=v_main_~n0~0_35} AuxVars[] AssignedVars[] [2021-05-02 23:32:17,220 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:17,221 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:17,227 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:17,251 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:17,268 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:17,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:17,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:17,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:17,755 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:17,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926291332] [2021-05-02 23:32:17,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [926291332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:17,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:17,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:32:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594394138] [2021-05-02 23:32:17,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:32:17,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:17,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:32:17,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:32:17,756 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:18,983 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-05-02 23:32:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:32:18,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2021-05-02 23:32:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:18,984 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:32:18,984 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:32:18,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1279.0ms TimeCoverageRelationStatistics Valid=304, Invalid=2666, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:32:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:32:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-05-02 23:32:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-02 23:32:18,991 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 44 [2021-05-02 23:32:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:18,991 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-02 23:32:18,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-02 23:32:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:32:18,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:18,992 INFO L523 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:18,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:32:18,992 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 143095939, now seen corresponding path program 13 times [2021-05-02 23:32:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:18,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467377660] [2021-05-02 23:32:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:18,995 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_246 v_main_~n0~0_36) InVars {main_~i0~0=v_main_~i0~0_246, main_~n0~0=v_main_~n0~0_36} OutVars{main_~i0~0=v_main_~i0~0_246, main_~n0~0=v_main_~n0~0_36} AuxVars[] AssignedVars[] [2021-05-02 23:32:18,998 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:19,008 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:19,013 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:19,021 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:19,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:19,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:19,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:19,422 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:19,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467377660] [2021-05-02 23:32:19,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467377660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:19,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:19,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:32:19,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984852714] [2021-05-02 23:32:19,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:32:19,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:32:19,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:32:19,423 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:20,223 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-05-02 23:32:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:32:20,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2021-05-02 23:32:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:20,223 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:32:20,223 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:32:20,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 876.8ms TimeCoverageRelationStatistics Valid=261, Invalid=2391, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:32:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:32:20,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 23:32:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-05-02 23:32:20,230 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2021-05-02 23:32:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:20,230 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-05-02 23:32:20,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-05-02 23:32:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:32:20,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:20,231 INFO L523 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:20,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:32:20,231 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1811408538, now seen corresponding path program 14 times [2021-05-02 23:32:20,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:20,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970236034] [2021-05-02 23:32:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:20,241 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_261 v_main_~n0~0_37) InVars {main_~i0~0=v_main_~i0~0_261, main_~n0~0=v_main_~n0~0_37} OutVars{main_~i0~0=v_main_~i0~0_261, main_~n0~0=v_main_~n0~0_37} AuxVars[] AssignedVars[] [2021-05-02 23:32:20,242 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:20,251 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:20,256 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:20,263 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:20,273 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:20,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:20,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:20,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:20,638 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:20,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970236034] [2021-05-02 23:32:20,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [970236034] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:20,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:20,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:32:20,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106647779] [2021-05-02 23:32:20,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:32:20,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:32:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:32:20,639 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:21,641 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-05-02 23:32:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:32:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-05-02 23:32:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:21,642 INFO L225 Difference]: With dead ends: 77 [2021-05-02 23:32:21,642 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:32:21,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1008.5ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:32:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:32:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-05-02 23:32:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 23:32:21,650 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2021-05-02 23:32:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:21,650 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 23:32:21,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 23:32:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:32:21,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:21,650 INFO L523 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:21,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:32:21,651 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:21,651 INFO L82 PathProgramCache]: Analyzing trace with hash 333587141, now seen corresponding path program 14 times [2021-05-02 23:32:21,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:21,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000962918] [2021-05-02 23:32:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:21,658 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_278 v_main_~n0~0_38) InVars {main_~i0~0=v_main_~i0~0_278, main_~n0~0=v_main_~n0~0_38} OutVars{main_~i0~0=v_main_~i0~0_278, main_~n0~0=v_main_~n0~0_38} AuxVars[] AssignedVars[] [2021-05-02 23:32:21,659 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:21,659 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:21,664 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:21,687 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:21,700 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:21,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:21,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:21,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:22,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:22,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000962918] [2021-05-02 23:32:22,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000962918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:22,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:22,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:32:22,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033176311] [2021-05-02 23:32:22,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:32:22,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:32:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:32:22,196 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:23,215 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-05-02 23:32:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:32:23,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-05-02 23:32:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:23,216 INFO L225 Difference]: With dead ends: 73 [2021-05-02 23:32:23,216 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:32:23,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1112.8ms TimeCoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:32:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:32:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 23:32:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-05-02 23:32:23,222 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2021-05-02 23:32:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:23,222 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-05-02 23:32:23,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-05-02 23:32:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:32:23,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:23,223 INFO L523 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:23,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:32:23,223 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -201148572, now seen corresponding path program 15 times [2021-05-02 23:32:23,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:23,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225344111] [2021-05-02 23:32:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:23,227 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_294 v_main_~n0~0_39) InVars {main_~i0~0=v_main_~i0~0_294, main_~n0~0=v_main_~n0~0_39} OutVars{main_~i0~0=v_main_~i0~0_294, main_~n0~0=v_main_~n0~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:32:23,228 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:23,228 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:23,233 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:23,253 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:23,268 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:23,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:23,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:23,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:23,758 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:23,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225344111] [2021-05-02 23:32:23,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225344111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:23,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:23,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:32:23,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693526665] [2021-05-02 23:32:23,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:32:23,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:32:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:32:23,759 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:25,131 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-05-02 23:32:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:32:25,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2021-05-02 23:32:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:25,132 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:32:25,132 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:32:25,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1355.1ms TimeCoverageRelationStatistics Valid=326, Invalid=3096, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:32:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:32:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-05-02 23:32:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-02 23:32:25,138 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 46 [2021-05-02 23:32:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:25,138 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-02 23:32:25,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-02 23:32:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:32:25,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:25,139 INFO L523 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:25,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:32:25,139 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1943847107, now seen corresponding path program 15 times [2021-05-02 23:32:25,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:25,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336904264] [2021-05-02 23:32:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:25,142 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_312 v_main_~n0~0_40) InVars {main_~i0~0=v_main_~i0~0_312, main_~n0~0=v_main_~n0~0_40} OutVars{main_~i0~0=v_main_~i0~0_312, main_~n0~0=v_main_~n0~0_40} AuxVars[] AssignedVars[] [2021-05-02 23:32:25,144 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:25,144 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:25,149 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:25,171 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:25,186 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:25,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:25,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:25,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:25,679 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:25,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336904264] [2021-05-02 23:32:25,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336904264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:25,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:25,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:32:25,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550180341] [2021-05-02 23:32:25,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:32:25,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:32:25,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:32:25,680 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:26,775 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-05-02 23:32:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:32:26,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2021-05-02 23:32:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:26,776 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:32:26,776 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:32:26,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1155.1ms TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:32:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:32:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 23:32:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-05-02 23:32:26,782 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2021-05-02 23:32:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:26,782 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-05-02 23:32:26,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-05-02 23:32:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:32:26,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:26,782 INFO L523 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:26,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:32:26,782 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1822697178, now seen corresponding path program 16 times [2021-05-02 23:32:26,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:26,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752163299] [2021-05-02 23:32:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:26,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_329 v_main_~n0~0_41) InVars {main_~i0~0=v_main_~i0~0_329, main_~n0~0=v_main_~n0~0_41} OutVars{main_~i0~0=v_main_~i0~0_329, main_~n0~0=v_main_~n0~0_41} AuxVars[] AssignedVars[] [2021-05-02 23:32:26,787 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:26,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:26,793 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:26,816 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:26,833 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:26,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:26,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:26,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:27,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:27,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752163299] [2021-05-02 23:32:27,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [752163299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:27,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:27,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:32:27,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445951458] [2021-05-02 23:32:27,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:32:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:32:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:32:27,371 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:28,816 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-05-02 23:32:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:32:28,817 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-05-02 23:32:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:28,818 INFO L225 Difference]: With dead ends: 79 [2021-05-02 23:32:28,818 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:32:28,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1453.7ms TimeCoverageRelationStatistics Valid=337, Invalid=3323, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:32:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:32:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-05-02 23:32:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-05-02 23:32:28,824 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 47 [2021-05-02 23:32:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:28,824 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-05-02 23:32:28,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-05-02 23:32:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:32:28,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:28,825 INFO L523 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:28,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:32:28,825 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 322298501, now seen corresponding path program 16 times [2021-05-02 23:32:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:28,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604198088] [2021-05-02 23:32:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:28,828 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_348 v_main_~n0~0_42) InVars {main_~i0~0=v_main_~i0~0_348, main_~n0~0=v_main_~n0~0_42} OutVars{main_~i0~0=v_main_~i0~0_348, main_~n0~0=v_main_~n0~0_42} AuxVars[] AssignedVars[] [2021-05-02 23:32:28,830 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:28,830 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:28,836 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:28,859 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:28,875 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:28,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:29,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:29,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:29,407 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:29,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604198088] [2021-05-02 23:32:29,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604198088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:29,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:29,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:32:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544488767] [2021-05-02 23:32:29,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:32:29,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:32:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:32:29,408 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:30,548 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-05-02 23:32:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:32:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-05-02 23:32:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:30,550 INFO L225 Difference]: With dead ends: 75 [2021-05-02 23:32:30,550 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:32:30,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1262.2ms TimeCoverageRelationStatistics Valid=269, Invalid=3037, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:32:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:32:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 23:32:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-05-02 23:32:30,557 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2021-05-02 23:32:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:30,557 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-05-02 23:32:30,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-05-02 23:32:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:32:30,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:30,581 INFO L523 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:30,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:32:30,581 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash -551096412, now seen corresponding path program 17 times [2021-05-02 23:32:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:30,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789016857] [2021-05-02 23:32:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:30,585 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_366 v_main_~n0~0_43) InVars {main_~i0~0=v_main_~i0~0_366, main_~n0~0=v_main_~n0~0_43} OutVars{main_~i0~0=v_main_~i0~0_366, main_~n0~0=v_main_~n0~0_43} AuxVars[] AssignedVars[] [2021-05-02 23:32:30,586 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:30,597 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:30,602 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:30,611 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:30,626 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:30,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:30,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:30,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:31,194 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:31,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789016857] [2021-05-02 23:32:31,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [789016857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:31,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:31,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:32:31,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997347829] [2021-05-02 23:32:31,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:32:31,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:32:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:32:31,195 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:32,628 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-05-02 23:32:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:32:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2021-05-02 23:32:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:32,629 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:32:32,629 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:32:32,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1516.6ms TimeCoverageRelationStatistics Valid=317, Invalid=3589, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:32:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:32:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-05-02 23:32:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-05-02 23:32:32,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 48 [2021-05-02 23:32:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:32,636 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-05-02 23:32:32,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-05-02 23:32:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:32:32,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:32,636 INFO L523 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:32,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:32:32,636 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1593899267, now seen corresponding path program 17 times [2021-05-02 23:32:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:32,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397111819] [2021-05-02 23:32:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:32,640 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_386 v_main_~n0~0_44) InVars {main_~i0~0=v_main_~i0~0_386, main_~n0~0=v_main_~n0~0_44} OutVars{main_~i0~0=v_main_~i0~0_386, main_~n0~0=v_main_~n0~0_44} AuxVars[] AssignedVars[] [2021-05-02 23:32:32,641 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:32,642 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:32,647 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:32,670 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:32,687 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:32,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:32,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:32,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:33,236 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:33,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397111819] [2021-05-02 23:32:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397111819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:33,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:33,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:32:33,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80512845] [2021-05-02 23:32:33,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:32:33,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:33,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:32:33,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:32:33,238 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:34,381 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-05-02 23:32:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:32:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2021-05-02 23:32:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:34,382 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:32:34,382 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:32:34,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1274.2ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:32:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:32:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 23:32:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-02 23:32:34,389 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2021-05-02 23:32:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:34,389 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-02 23:32:34,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-02 23:32:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:32:34,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:34,389 INFO L523 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:34,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:32:34,389 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash 213821670, now seen corresponding path program 18 times [2021-05-02 23:32:34,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:34,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663695749] [2021-05-02 23:32:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:34,393 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_405 v_main_~n0~0_45) InVars {main_~i0~0=v_main_~i0~0_405, main_~n0~0=v_main_~n0~0_45} OutVars{main_~i0~0=v_main_~i0~0_405, main_~n0~0=v_main_~n0~0_45} AuxVars[] AssignedVars[] [2021-05-02 23:32:34,394 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:34,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:34,401 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:34,425 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:34,442 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:34,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:34,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:34,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:35,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:35,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663695749] [2021-05-02 23:32:35,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663695749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:35,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:35,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:32:35,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745378820] [2021-05-02 23:32:35,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:32:35,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:32:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:32:35,019 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:36,504 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-05-02 23:32:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:32:36,504 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2021-05-02 23:32:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:36,504 INFO L225 Difference]: With dead ends: 81 [2021-05-02 23:32:36,505 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 23:32:36,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1518.4ms TimeCoverageRelationStatistics Valid=326, Invalid=3834, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:32:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 23:32:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-05-02 23:32:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-05-02 23:32:36,511 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 49 [2021-05-02 23:32:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:36,511 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-05-02 23:32:36,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-05-02 23:32:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:32:36,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:36,512 INFO L523 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:36,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:32:36,512 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1936149947, now seen corresponding path program 18 times [2021-05-02 23:32:36,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:36,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980955639] [2021-05-02 23:32:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:36,515 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_426 v_main_~n0~0_46) InVars {main_~i0~0=v_main_~i0~0_426, main_~n0~0=v_main_~n0~0_46} OutVars{main_~i0~0=v_main_~i0~0_426, main_~n0~0=v_main_~n0~0_46} AuxVars[] AssignedVars[] [2021-05-02 23:32:36,517 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:36,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:36,523 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:36,545 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:36,561 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:36,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:36,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:37,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:37,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980955639] [2021-05-02 23:32:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [980955639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:37,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:37,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:32:37,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990498182] [2021-05-02 23:32:37,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:32:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:32:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:32:37,159 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:38,473 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-05-02 23:32:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:32:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2021-05-02 23:32:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:38,474 INFO L225 Difference]: With dead ends: 79 [2021-05-02 23:32:38,474 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:32:38,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1407.6ms TimeCoverageRelationStatistics Valid=329, Invalid=3703, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:32:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:32:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-05-02 23:32:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-02 23:32:38,482 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 49 [2021-05-02 23:32:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:38,482 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-02 23:32:38,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-02 23:32:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:32:38,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:38,482 INFO L523 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:38,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:32:38,482 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1843521564, now seen corresponding path program 19 times [2021-05-02 23:32:38,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:38,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555019435] [2021-05-02 23:32:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:38,486 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_446 v_main_~n0~0_47) InVars {main_~i0~0=v_main_~i0~0_446, main_~n0~0=v_main_~n0~0_47} OutVars{main_~i0~0=v_main_~i0~0_446, main_~n0~0=v_main_~n0~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:32:38,487 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:38,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:38,493 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:38,515 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:38,531 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:38,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:38,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:38,653 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 23:32:39,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:39,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555019435] [2021-05-02 23:32:39,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [555019435] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:39,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:39,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:32:39,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273128302] [2021-05-02 23:32:39,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:32:39,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:39,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:32:39,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:32:39,187 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:40,956 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-05-02 23:32:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:32:40,957 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2021-05-02 23:32:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:40,957 INFO L225 Difference]: With dead ends: 85 [2021-05-02 23:32:40,957 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:32:40,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1838.8ms TimeCoverageRelationStatistics Valid=357, Invalid=4335, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:32:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:32:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-05-02 23:32:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-05-02 23:32:40,965 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 50 [2021-05-02 23:32:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:40,965 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-05-02 23:32:40,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-05-02 23:32:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:32:40,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:40,966 INFO L523 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:40,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:32:40,966 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash 301474115, now seen corresponding path program 19 times [2021-05-02 23:32:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:40,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559043635] [2021-05-02 23:32:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:40,970 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_468 v_main_~n0~0_48) InVars {main_~i0~0=v_main_~i0~0_468, main_~n0~0=v_main_~n0~0_48} OutVars{main_~i0~0=v_main_~i0~0_468, main_~n0~0=v_main_~n0~0_48} AuxVars[] AssignedVars[] [2021-05-02 23:32:40,971 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:40,971 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:40,977 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:41,000 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:41,016 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:41,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:41,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:41,709 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:41,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559043635] [2021-05-02 23:32:41,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559043635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:41,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:41,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:32:41,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200236320] [2021-05-02 23:32:41,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:32:41,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:32:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:32:41,710 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:43,196 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-05-02 23:32:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:32:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2021-05-02 23:32:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:43,197 INFO L225 Difference]: With dead ends: 81 [2021-05-02 23:32:43,197 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:32:43,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1586.6ms TimeCoverageRelationStatistics Valid=351, Invalid=3939, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:32:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:32:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 23:32:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-05-02 23:32:43,204 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2021-05-02 23:32:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:43,204 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-05-02 23:32:43,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-05-02 23:32:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:32:43,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:43,205 INFO L523 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:43,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:32:43,205 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:43,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1196652378, now seen corresponding path program 20 times [2021-05-02 23:32:43,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:43,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297729270] [2021-05-02 23:32:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:43,219 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_489 v_main_~n0~0_49) InVars {main_~i0~0=v_main_~i0~0_489, main_~n0~0=v_main_~n0~0_49} OutVars{main_~i0~0=v_main_~i0~0_489, main_~n0~0=v_main_~n0~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:32:43,220 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:43,230 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:43,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:43,243 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:43,257 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:43,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:43,970 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:43,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297729270] [2021-05-02 23:32:43,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297729270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:43,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:43,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:32:43,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132370741] [2021-05-02 23:32:43,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:32:43,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:32:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:32:43,971 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:45,869 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-02 23:32:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:32:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-05-02 23:32:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:45,870 INFO L225 Difference]: With dead ends: 83 [2021-05-02 23:32:45,870 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:32:45,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1888.6ms TimeCoverageRelationStatistics Valid=344, Invalid=4348, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:32:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:32:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-05-02 23:32:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-02 23:32:45,878 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2021-05-02 23:32:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:45,878 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-02 23:32:45,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-02 23:32:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:32:45,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:45,878 INFO L523 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:45,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:32:45,878 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash 948343301, now seen corresponding path program 20 times [2021-05-02 23:32:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:45,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049597333] [2021-05-02 23:32:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:45,882 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_512 v_main_~n0~0_50) InVars {main_~i0~0=v_main_~i0~0_512, main_~n0~0=v_main_~n0~0_50} OutVars{main_~i0~0=v_main_~i0~0_512, main_~n0~0=v_main_~n0~0_50} AuxVars[] AssignedVars[] [2021-05-02 23:32:45,883 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:45,884 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:45,890 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:45,915 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:45,933 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:46,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:46,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:46,668 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049597333] [2021-05-02 23:32:46,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049597333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:46,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:46,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:32:46,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438925209] [2021-05-02 23:32:46,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:32:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:32:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:32:46,670 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:48,220 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-05-02 23:32:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:32:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-05-02 23:32:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:48,221 INFO L225 Difference]: With dead ends: 79 [2021-05-02 23:32:48,221 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:32:48,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1710.6ms TimeCoverageRelationStatistics Valid=338, Invalid=3952, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:32:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:32:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 23:32:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-05-02 23:32:48,228 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 51 [2021-05-02 23:32:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:48,228 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-05-02 23:32:48,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-05-02 23:32:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:32:48,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:48,229 INFO L523 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:48,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:32:48,229 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1676423204, now seen corresponding path program 21 times [2021-05-02 23:32:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:48,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119210709] [2021-05-02 23:32:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:48,232 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_534 v_main_~n0~0_51) InVars {main_~i0~0=v_main_~i0~0_534, main_~n0~0=v_main_~n0~0_51} OutVars{main_~i0~0=v_main_~i0~0_534, main_~n0~0=v_main_~n0~0_51} AuxVars[] AssignedVars[] [2021-05-02 23:32:48,234 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:48,248 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:48,254 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:48,266 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:48,284 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:48,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:48,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:49,062 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:49,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119210709] [2021-05-02 23:32:49,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [119210709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:49,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:49,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:32:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861628584] [2021-05-02 23:32:49,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:32:49,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:32:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:32:49,064 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:51,112 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-05-02 23:32:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:32:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-05-02 23:32:51,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:51,113 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:32:51,113 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:32:51,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2059.0ms TimeCoverageRelationStatistics Valid=353, Invalid=4617, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:32:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:32:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-05-02 23:32:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 49 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-05-02 23:32:51,121 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 52 [2021-05-02 23:32:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:51,121 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-05-02 23:32:51,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-05-02 23:32:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:32:51,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:51,121 INFO L523 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:51,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:32:51,121 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash -473548413, now seen corresponding path program 21 times [2021-05-02 23:32:51,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:51,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848679222] [2021-05-02 23:32:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:51,125 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_558 v_main_~n0~0_52) InVars {main_~i0~0=v_main_~i0~0_558, main_~n0~0=v_main_~n0~0_52} OutVars{main_~i0~0=v_main_~i0~0_558, main_~n0~0=v_main_~n0~0_52} AuxVars[] AssignedVars[] [2021-05-02 23:32:51,127 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:51,141 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:51,147 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:51,158 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:51,176 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:51,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:51,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:51,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:51,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:51,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848679222] [2021-05-02 23:32:51,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [848679222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:51,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:51,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:32:51,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139773455] [2021-05-02 23:32:51,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:32:51,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:32:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:32:51,950 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:53,598 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-05-02 23:32:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:32:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-05-02 23:32:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:53,599 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:32:53,599 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:32:53,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1808.7ms TimeCoverageRelationStatistics Valid=349, Invalid=4207, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:32:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:32:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 23:32:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-05-02 23:32:53,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2021-05-02 23:32:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:53,607 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-05-02 23:32:53,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-05-02 23:32:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:32:53,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:53,607 INFO L523 BasicCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:53,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:32:53,607 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash 547453030, now seen corresponding path program 22 times [2021-05-02 23:32:53,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:53,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656022001] [2021-05-02 23:32:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:53,614 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_581 v_main_~n0~0_53) InVars {main_~i0~0=v_main_~i0~0_581, main_~n0~0=v_main_~n0~0_53} OutVars{main_~i0~0=v_main_~i0~0_581, main_~n0~0=v_main_~n0~0_53} AuxVars[] AssignedVars[] [2021-05-02 23:32:53,616 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:53,630 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:53,637 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:53,662 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:53,680 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:53,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:53,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:53,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:54,483 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:54,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656022001] [2021-05-02 23:32:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656022001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:32:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177144312] [2021-05-02 23:32:54,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:32:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:54,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:32:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:32:54,486 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:56,376 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-05-02 23:32:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:32:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2021-05-02 23:32:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:56,377 INFO L225 Difference]: With dead ends: 85 [2021-05-02 23:32:56,377 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:32:56,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 2006.3ms TimeCoverageRelationStatistics Valid=362, Invalid=4894, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:32:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:32:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2021-05-02 23:32:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-05-02 23:32:56,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 53 [2021-05-02 23:32:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:56,385 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-05-02 23:32:56,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-05-02 23:32:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:32:56,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:56,386 INFO L523 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:56,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:32:56,386 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1602518587, now seen corresponding path program 22 times [2021-05-02 23:32:56,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:56,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282763567] [2021-05-02 23:32:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:56,389 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_606 v_main_~n0~0_54) InVars {main_~i0~0=v_main_~i0~0_606, main_~n0~0=v_main_~n0~0_54} OutVars{main_~i0~0=v_main_~i0~0_606, main_~n0~0=v_main_~n0~0_54} AuxVars[] AssignedVars[] [2021-05-02 23:32:56,390 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:56,404 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:56,415 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:56,426 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:56,443 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:56,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:32:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:56,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:32:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:56,583 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 23:32:57,206 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:57,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282763567] [2021-05-02 23:32:57,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282763567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:57,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:57,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:32:57,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756790351] [2021-05-02 23:32:57,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:32:57,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:32:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:32:57,208 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:58,914 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-05-02 23:32:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:32:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2021-05-02 23:32:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:58,915 INFO L225 Difference]: With dead ends: 81 [2021-05-02 23:32:58,915 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:32:58,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1808.0ms TimeCoverageRelationStatistics Valid=360, Invalid=4470, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:32:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:32:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 23:32:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:32:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-05-02 23:32:58,922 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2021-05-02 23:32:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:58,923 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-05-02 23:32:58,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-05-02 23:32:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:32:58,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:58,923 INFO L523 BasicCegarLoop]: trace histogram [23, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:58,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:32:58,923 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -90883996, now seen corresponding path program 23 times [2021-05-02 23:32:58,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:58,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107834755] [2021-05-02 23:32:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:58,927 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_630 v_main_~n0~0_55) InVars {main_~i0~0=v_main_~i0~0_630, main_~n0~0=v_main_~n0~0_55} OutVars{main_~i0~0=v_main_~i0~0_630, main_~n0~0=v_main_~n0~0_55} AuxVars[] AssignedVars[] [2021-05-02 23:32:58,928 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:32:58,941 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:58,947 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:32:58,958 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:32:58,974 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:59,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:59,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:32:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:59,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:32:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:59,759 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:59,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107834755] [2021-05-02 23:32:59,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107834755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:59,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:59,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:32:59,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050192800] [2021-05-02 23:32:59,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:32:59,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:59,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:32:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:32:59,760 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:01,959 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-05-02 23:33:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:33:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2021-05-02 23:33:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:01,960 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:33:01,960 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:33:01,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 2096.3ms TimeCoverageRelationStatistics Valid=414, Invalid=5136, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:33:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:33:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-05-02 23:33:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-05-02 23:33:01,968 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 54 [2021-05-02 23:33:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:01,968 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-05-02 23:33:01,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-05-02 23:33:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:33:01,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:01,968 INFO L523 BasicCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:01,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:33:01,968 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2054111683, now seen corresponding path program 23 times [2021-05-02 23:33:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573091359] [2021-05-02 23:33:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:01,972 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_656 v_main_~n0~0_56) InVars {main_~i0~0=v_main_~i0~0_656, main_~n0~0=v_main_~n0~0_56} OutVars{main_~i0~0=v_main_~i0~0_656, main_~n0~0=v_main_~n0~0_56} AuxVars[] AssignedVars[] [2021-05-02 23:33:01,973 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:01,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:01,980 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:02,005 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:02,022 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:02,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:02,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:02,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:02,875 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:02,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573091359] [2021-05-02 23:33:02,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573091359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:02,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:02,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:33:02,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626464121] [2021-05-02 23:33:02,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:33:02,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:02,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:33:02,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:33:02,876 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:04,616 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-05-02 23:33:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:33:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2021-05-02 23:33:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:04,617 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:33:04,617 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:33:04,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1904.9ms TimeCoverageRelationStatistics Valid=371, Invalid=4741, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:33:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:33:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 23:33:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-05-02 23:33:04,625 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 54 [2021-05-02 23:33:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:04,625 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-05-02 23:33:04,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-05-02 23:33:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:33:04,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:04,625 INFO L523 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:04,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:33:04,625 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1595504678, now seen corresponding path program 24 times [2021-05-02 23:33:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:04,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180882831] [2021-05-02 23:33:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:04,659 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_681 v_main_~n0~0_57) InVars {main_~i0~0=v_main_~i0~0_681, main_~n0~0=v_main_~n0~0_57} OutVars{main_~i0~0=v_main_~i0~0_681, main_~n0~0=v_main_~n0~0_57} AuxVars[] AssignedVars[] [2021-05-02 23:33:04,660 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:04,672 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:04,677 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:04,687 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:04,702 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:04,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:04,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:04,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:05,559 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:05,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180882831] [2021-05-02 23:33:05,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180882831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:05,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:05,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:33:05,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055057114] [2021-05-02 23:33:05,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:33:05,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:05,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:33:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:33:05,560 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:07,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:07,770 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-05-02 23:33:07,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:33:07,770 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-05-02 23:33:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:07,771 INFO L225 Difference]: With dead ends: 87 [2021-05-02 23:33:07,771 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 23:33:07,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2260.4ms TimeCoverageRelationStatistics Valid=380, Invalid=5472, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:33:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 23:33:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 23:33:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-05-02 23:33:07,786 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 55 [2021-05-02 23:33:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:07,786 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-05-02 23:33:07,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-05-02 23:33:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:33:07,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:07,786 INFO L523 BasicCegarLoop]: trace histogram [23, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:07,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:33:07,786 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash -554466939, now seen corresponding path program 24 times [2021-05-02 23:33:07,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:07,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712240166] [2021-05-02 23:33:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:07,790 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_708 v_main_~n0~0_58) InVars {main_~i0~0=v_main_~i0~0_708, main_~n0~0=v_main_~n0~0_58} OutVars{main_~i0~0=v_main_~i0~0_708, main_~n0~0=v_main_~n0~0_58} AuxVars[] AssignedVars[] [2021-05-02 23:33:07,791 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:07,792 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:07,799 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:07,818 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:07,833 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:07,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:08,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:08,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:08,723 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712240166] [2021-05-02 23:33:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [712240166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:08,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:08,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:33:08,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247478003] [2021-05-02 23:33:08,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:33:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:33:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:33:08,725 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:10,633 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2021-05-02 23:33:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:33:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-05-02 23:33:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:10,634 INFO L225 Difference]: With dead ends: 83 [2021-05-02 23:33:10,634 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:33:10,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2056.6ms TimeCoverageRelationStatistics Valid=341, Invalid=5061, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:33:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:33:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 23:33:10,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-05-02 23:33:10,642 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 55 [2021-05-02 23:33:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:10,642 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-05-02 23:33:10,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-05-02 23:33:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:33:10,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:10,643 INFO L523 BasicCegarLoop]: trace histogram [25, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:10,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:33:10,643 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:10,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:10,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1961021276, now seen corresponding path program 25 times [2021-05-02 23:33:10,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:10,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539360024] [2021-05-02 23:33:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:10,647 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_734 v_main_~n0~0_59) InVars {main_~i0~0=v_main_~i0~0_734, main_~n0~0=v_main_~n0~0_59} OutVars{main_~i0~0=v_main_~i0~0_734, main_~n0~0=v_main_~n0~0_59} AuxVars[] AssignedVars[] [2021-05-02 23:33:10,648 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:10,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:10,655 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:10,679 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:10,695 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:11,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:11,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539360024] [2021-05-02 23:33:11,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539360024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:11,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:11,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:33:11,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278440363] [2021-05-02 23:33:11,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:33:11,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:33:11,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:33:11,629 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:13,978 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-02 23:33:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:33:13,979 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-05-02 23:33:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:13,979 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:33:13,979 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:33:13,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2403.3ms TimeCoverageRelationStatistics Valid=436, Invalid=5726, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:33:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:33:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 23:33:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 53 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-05-02 23:33:13,987 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 56 [2021-05-02 23:33:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:13,988 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-05-02 23:33:13,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-05-02 23:33:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:33:13,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:13,988 INFO L523 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:13,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:33:13,988 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:13,988 INFO L82 PathProgramCache]: Analyzing trace with hash 183974403, now seen corresponding path program 25 times [2021-05-02 23:33:13,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:13,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370566176] [2021-05-02 23:33:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:13,995 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_762 v_main_~n0~0_60) InVars {main_~i0~0=v_main_~i0~0_762, main_~n0~0=v_main_~n0~0_60} OutVars{main_~i0~0=v_main_~i0~0_762, main_~n0~0=v_main_~n0~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:33:13,996 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:14,010 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:14,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:14,028 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:14,046 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:14,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:14,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:14,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:14,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370566176] [2021-05-02 23:33:14,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370566176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:14,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:14,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:33:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405386151] [2021-05-02 23:33:14,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:33:14,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:33:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:33:14,973 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:17,124 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-05-02 23:33:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:33:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-05-02 23:33:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:17,125 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:33:17,125 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 23:33:17,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2252.4ms TimeCoverageRelationStatistics Valid=406, Invalid=5600, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:33:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 23:33:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-05-02 23:33:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 55 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-05-02 23:33:17,135 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 56 [2021-05-02 23:33:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:17,135 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-05-02 23:33:17,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-05-02 23:33:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:33:17,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:17,136 INFO L523 BasicCegarLoop]: trace histogram [26, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:17,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:33:17,136 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -544176154, now seen corresponding path program 26 times [2021-05-02 23:33:17,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:17,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275590189] [2021-05-02 23:33:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:17,140 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_789 v_main_~n0~0_61) InVars {main_~i0~0=v_main_~i0~0_789, main_~n0~0=v_main_~n0~0_61} OutVars{main_~i0~0=v_main_~i0~0_789, main_~n0~0=v_main_~n0~0_61} AuxVars[] AssignedVars[] [2021-05-02 23:33:17,141 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:17,142 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:17,148 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:17,174 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:17,192 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:17,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:17,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:17,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:18,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275590189] [2021-05-02 23:33:18,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275590189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:18,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:18,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:33:18,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874297682] [2021-05-02 23:33:18,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:33:18,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:33:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:33:18,196 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:20,806 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-02 23:33:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:33:20,807 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2021-05-02 23:33:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:20,808 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:33:20,808 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:33:20,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2672.8ms TimeCoverageRelationStatistics Valid=471, Invalid=6335, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:33:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:33:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2021-05-02 23:33:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-05-02 23:33:20,818 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 57 [2021-05-02 23:33:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:20,818 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-05-02 23:33:20,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-05-02 23:33:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:33:20,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:20,818 INFO L523 BasicCegarLoop]: trace histogram [25, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:20,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:33:20,818 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1600819525, now seen corresponding path program 26 times [2021-05-02 23:33:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:20,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335830029] [2021-05-02 23:33:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:20,823 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_818 v_main_~n0~0_62) InVars {main_~i0~0=v_main_~i0~0_818, main_~n0~0=v_main_~n0~0_62} OutVars{main_~i0~0=v_main_~i0~0_818, main_~n0~0=v_main_~n0~0_62} AuxVars[] AssignedVars[] [2021-05-02 23:33:20,824 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:20,839 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:20,846 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:20,859 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:20,878 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:21,855 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335830029] [2021-05-02 23:33:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [335830029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:21,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:21,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:33:21,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413340788] [2021-05-02 23:33:21,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:33:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:21,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:33:21,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:33:21,857 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:23,847 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-05-02 23:33:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:33:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2021-05-02 23:33:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:23,850 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:33:23,851 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:33:23,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2237.9ms TimeCoverageRelationStatistics Valid=428, Invalid=5892, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:33:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:33:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 23:33:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-05-02 23:33:23,860 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 57 [2021-05-02 23:33:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:23,860 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-05-02 23:33:23,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-05-02 23:33:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:33:23,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:23,861 INFO L523 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:23,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:33:23,861 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:23,861 INFO L82 PathProgramCache]: Analyzing trace with hash 428349668, now seen corresponding path program 27 times [2021-05-02 23:33:23,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:23,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265139696] [2021-05-02 23:33:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:23,864 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_846 v_main_~n0~0_63) InVars {main_~i0~0=v_main_~i0~0_846, main_~n0~0=v_main_~n0~0_63} OutVars{main_~i0~0=v_main_~i0~0_846, main_~n0~0=v_main_~n0~0_63} AuxVars[] AssignedVars[] [2021-05-02 23:33:23,865 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:23,867 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:23,872 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:23,893 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:23,908 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:25,003 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:25,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265139696] [2021-05-02 23:33:25,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265139696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:25,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:25,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:33:25,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539300712] [2021-05-02 23:33:25,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:33:25,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:33:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:33:25,004 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:27,665 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-05-02 23:33:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:33:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-05-02 23:33:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:27,666 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:33:27,667 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 23:33:27,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 2648.8ms TimeCoverageRelationStatistics Valid=407, Invalid=6399, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:33:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 23:33:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2021-05-02 23:33:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 55 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-05-02 23:33:27,675 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 58 [2021-05-02 23:33:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:27,675 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-05-02 23:33:27,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-05-02 23:33:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:33:27,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:27,676 INFO L523 BasicCegarLoop]: trace histogram [26, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:27,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:33:27,676 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1721621949, now seen corresponding path program 27 times [2021-05-02 23:33:27,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:27,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28721081] [2021-05-02 23:33:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:27,680 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_876 v_main_~n0~0_64) InVars {main_~i0~0=v_main_~i0~0_876, main_~n0~0=v_main_~n0~0_64} OutVars{main_~i0~0=v_main_~i0~0_876, main_~n0~0=v_main_~n0~0_64} AuxVars[] AssignedVars[] [2021-05-02 23:33:27,681 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:27,682 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:27,688 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:27,713 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:27,731 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:28,790 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:28,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28721081] [2021-05-02 23:33:28,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [28721081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:28,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:28,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:33:28,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91735777] [2021-05-02 23:33:28,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:33:28,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:28,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:33:28,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:33:28,791 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:31,117 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-05-02 23:33:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:33:31,118 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-05-02 23:33:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:31,118 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:33:31,118 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:33:31,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2421.5ms TimeCoverageRelationStatistics Valid=415, Invalid=5905, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:33:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:33:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 23:33:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-05-02 23:33:31,127 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2021-05-02 23:33:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:31,127 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-05-02 23:33:31,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-05-02 23:33:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:33:31,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:31,128 INFO L523 BasicCegarLoop]: trace histogram [28, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:31,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:33:31,128 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash 511879078, now seen corresponding path program 28 times [2021-05-02 23:33:31,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:31,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126821462] [2021-05-02 23:33:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:31,132 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_905 v_main_~n0~0_65) InVars {main_~i0~0=v_main_~i0~0_905, main_~n0~0=v_main_~n0~0_65} OutVars{main_~i0~0=v_main_~i0~0_905, main_~n0~0=v_main_~n0~0_65} AuxVars[] AssignedVars[] [2021-05-02 23:33:31,136 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:31,147 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:31,152 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:31,161 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:31,183 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:31,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:31,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:31,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:32,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:32,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126821462] [2021-05-02 23:33:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [126821462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:32,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:32,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:33:32,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403935919] [2021-05-02 23:33:32,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:33:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:33:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1661, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:33:32,058 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:34,266 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-05-02 23:33:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:33:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 59 [2021-05-02 23:33:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:34,267 INFO L225 Difference]: With dead ends: 91 [2021-05-02 23:33:34,267 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 23:33:34,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2217.1ms TimeCoverageRelationStatistics Valid=469, Invalid=6671, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:33:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 23:33:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2021-05-02 23:33:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-05-02 23:33:34,276 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 59 [2021-05-02 23:33:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:34,276 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-05-02 23:33:34,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-05-02 23:33:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:33:34,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:34,276 INFO L523 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:34,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:33:34,276 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1638092539, now seen corresponding path program 28 times [2021-05-02 23:33:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:34,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701663262] [2021-05-02 23:33:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:34,280 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_936 v_main_~n0~0_66) InVars {main_~i0~0=v_main_~i0~0_936, main_~n0~0=v_main_~n0~0_66} OutVars{main_~i0~0=v_main_~i0~0_936, main_~n0~0=v_main_~n0~0_66} AuxVars[] AssignedVars[] [2021-05-02 23:33:34,282 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:34,283 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:34,288 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:34,314 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:34,334 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:34,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:34,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:34,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:34,485 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 23:33:35,467 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:35,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701663262] [2021-05-02 23:33:35,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701663262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:35,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:35,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:33:35,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055240793] [2021-05-02 23:33:35,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:33:35,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:33:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:33:35,468 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:37,987 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-05-02 23:33:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:33:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 59 [2021-05-02 23:33:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:37,989 INFO L225 Difference]: With dead ends: 87 [2021-05-02 23:33:37,989 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:33:37,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2670.8ms TimeCoverageRelationStatistics Valid=377, Invalid=6265, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:33:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:33:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 23:33:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-05-02 23:33:37,997 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2021-05-02 23:33:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:37,997 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-05-02 23:33:37,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-05-02 23:33:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:33:37,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:37,998 INFO L523 BasicCegarLoop]: trace histogram [29, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:37,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:33:37,998 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1193676508, now seen corresponding path program 29 times [2021-05-02 23:33:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839496349] [2021-05-02 23:33:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:38,002 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_966 v_main_~n0~0_67) InVars {main_~i0~0=v_main_~i0~0_966, main_~n0~0=v_main_~n0~0_67} OutVars{main_~i0~0=v_main_~i0~0_966, main_~n0~0=v_main_~n0~0_67} AuxVars[] AssignedVars[] [2021-05-02 23:33:38,003 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:38,004 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:38,011 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:38,037 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:38,054 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:38,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:38,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:39,231 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:39,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839496349] [2021-05-02 23:33:39,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [839496349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:39,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:39,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:33:39,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832923580] [2021-05-02 23:33:39,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:33:39,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:33:39,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:33:39,232 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:42,116 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-05-02 23:33:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:33:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-05-02 23:33:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:42,117 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:33:42,117 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:33:42,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2980.5ms TimeCoverageRelationStatistics Valid=480, Invalid=7002, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:33:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:33:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2021-05-02 23:33:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 57 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-05-02 23:33:42,126 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 60 [2021-05-02 23:33:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:42,126 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-05-02 23:33:42,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-05-02 23:33:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:33:42,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:42,127 INFO L523 BasicCegarLoop]: trace histogram [28, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:42,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:33:42,127 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:42,127 INFO L82 PathProgramCache]: Analyzing trace with hash 951319171, now seen corresponding path program 29 times [2021-05-02 23:33:42,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:42,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816193094] [2021-05-02 23:33:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:42,131 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_998 v_main_~n0~0_68) InVars {main_~i0~0=v_main_~i0~0_998, main_~n0~0=v_main_~n0~0_68} OutVars{main_~i0~0=v_main_~i0~0_998, main_~n0~0=v_main_~n0~0_68} AuxVars[] AssignedVars[] [2021-05-02 23:33:42,133 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:42,134 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:42,140 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:42,166 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:42,184 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:42,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:42,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:43,346 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:43,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816193094] [2021-05-02 23:33:43,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [816193094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:43,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:43,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:33:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943673244] [2021-05-02 23:33:43,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:33:43,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:33:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1744, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:33:43,361 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:45,660 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-05-02 23:33:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:33:45,661 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-05-02 23:33:45,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:45,661 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:33:45,661 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:33:45,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2536.3ms TimeCoverageRelationStatistics Valid=437, Invalid=6535, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:33:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:33:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-02 23:33:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-05-02 23:33:45,670 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 60 [2021-05-02 23:33:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:45,670 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-05-02 23:33:45,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-05-02 23:33:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:33:45,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:45,671 INFO L523 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:45,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:33:45,671 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:45,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1768675174, now seen corresponding path program 30 times [2021-05-02 23:33:45,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:45,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555062176] [2021-05-02 23:33:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:45,675 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1029 v_main_~n0~0_69) InVars {main_~i0~0=v_main_~i0~0_1029, main_~n0~0=v_main_~n0~0_69} OutVars{main_~i0~0=v_main_~i0~0_1029, main_~n0~0=v_main_~n0~0_69} AuxVars[] AssignedVars[] [2021-05-02 23:33:45,676 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:45,677 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:45,684 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:45,710 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:45,730 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:45,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:45,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:46,958 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555062176] [2021-05-02 23:33:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555062176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:46,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:46,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:33:46,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868472030] [2021-05-02 23:33:46,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:33:46,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:33:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1827, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:33:46,959 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:49,982 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-05-02 23:33:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:33:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 61 [2021-05-02 23:33:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:49,984 INFO L225 Difference]: With dead ends: 93 [2021-05-02 23:33:49,984 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:33:49,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 3106.1ms TimeCoverageRelationStatistics Valid=491, Invalid=7341, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:33:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:33:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-05-02 23:33:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.087719298245614) internal successors, (62), 58 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-05-02 23:33:49,993 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 61 [2021-05-02 23:33:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:49,993 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-05-02 23:33:49,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-05-02 23:33:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:33:49,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:49,993 INFO L523 BasicCegarLoop]: trace histogram [29, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:49,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:33:49,994 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash -381296443, now seen corresponding path program 30 times [2021-05-02 23:33:49,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:49,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899271912] [2021-05-02 23:33:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:50,023 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1062 v_main_~n0~0_70) InVars {main_~i0~0=v_main_~i0~0_1062, main_~n0~0=v_main_~n0~0_70} OutVars{main_~i0~0=v_main_~i0~0_1062, main_~n0~0=v_main_~n0~0_70} AuxVars[] AssignedVars[] [2021-05-02 23:33:50,025 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:50,039 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:50,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:50,057 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:50,075 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:50,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:50,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:51,362 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:51,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899271912] [2021-05-02 23:33:51,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899271912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:51,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:51,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:33:51,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650115350] [2021-05-02 23:33:51,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:33:51,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:33:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1828, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:33:51,364 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:54,015 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-05-02 23:33:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:33:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 61 [2021-05-02 23:33:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:54,029 INFO L225 Difference]: With dead ends: 89 [2021-05-02 23:33:54,029 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:33:54,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2843.3ms TimeCoverageRelationStatistics Valid=448, Invalid=6862, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:33:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:33:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 23:33:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-05-02 23:33:54,049 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 61 [2021-05-02 23:33:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:54,049 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-05-02 23:33:54,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-05-02 23:33:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:33:54,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:54,049 INFO L523 BasicCegarLoop]: trace histogram [31, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:54,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:33:54,050 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -887703196, now seen corresponding path program 31 times [2021-05-02 23:33:54,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:54,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801021014] [2021-05-02 23:33:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:54,057 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1094 v_main_~n0~0_71) InVars {main_~i0~0=v_main_~i0~0_1094, main_~n0~0=v_main_~n0~0_71} OutVars{main_~i0~0=v_main_~i0~0_1094, main_~n0~0=v_main_~n0~0_71} AuxVars[] AssignedVars[] [2021-05-02 23:33:54,058 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:54,059 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:54,064 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:54,084 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:54,101 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:54,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:54,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:33:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:54,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:33:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:55,468 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:55,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801021014] [2021-05-02 23:33:55,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801021014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:55,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:55,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:33:55,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908433651] [2021-05-02 23:33:55,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:33:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:55,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:33:55,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:33:55,469 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:58,916 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-05-02 23:33:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:33:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-05-02 23:33:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:58,917 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:33:58,917 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:33:58,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 3376.1ms TimeCoverageRelationStatistics Valid=502, Invalid=7688, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:33:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:33:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-05-02 23:33:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 59 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:33:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-05-02 23:33:58,927 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 62 [2021-05-02 23:33:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:58,927 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-05-02 23:33:58,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-05-02 23:33:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:33:58,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:58,927 INFO L523 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:58,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:33:58,927 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:58,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1257292483, now seen corresponding path program 31 times [2021-05-02 23:33:58,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:58,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469803219] [2021-05-02 23:33:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:58,934 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1128 v_main_~n0~0_72) InVars {main_~i0~0=v_main_~i0~0_1128, main_~n0~0=v_main_~n0~0_72} OutVars{main_~i0~0=v_main_~i0~0_1128, main_~n0~0=v_main_~n0~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:33:58,935 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:33:58,951 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:58,958 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:58,969 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:33:58,987 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:59,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:59,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:33:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:59,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:33:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:00,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469803219] [2021-05-02 23:34:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [469803219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:00,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:00,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:34:00,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49551943] [2021-05-02 23:34:00,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:34:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:34:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:34:00,386 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:03,398 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-02 23:34:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:34:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-05-02 23:34:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:03,400 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:34:03,400 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 23:34:03,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 3224.8ms TimeCoverageRelationStatistics Valid=472, Invalid=7538, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:34:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 23:34:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-05-02 23:34:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 61 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-05-02 23:34:03,411 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 62 [2021-05-02 23:34:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:03,411 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-05-02 23:34:03,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-05-02 23:34:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:34:03,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:03,412 INFO L523 BasicCegarLoop]: trace histogram [32, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:03,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:34:03,412 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:03,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1631054042, now seen corresponding path program 32 times [2021-05-02 23:34:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:03,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619062980] [2021-05-02 23:34:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:03,421 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1161 v_main_~n0~0_73) InVars {main_~i0~0=v_main_~i0~0_1161, main_~n0~0=v_main_~n0~0_73} OutVars{main_~i0~0=v_main_~i0~0_1161, main_~n0~0=v_main_~n0~0_73} AuxVars[] AssignedVars[] [2021-05-02 23:34:03,423 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:03,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:03,443 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:03,455 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:03,475 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:03,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:34:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:03,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:34:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:04,907 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:04,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619062980] [2021-05-02 23:34:04,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619062980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:04,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:04,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:34:04,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231315679] [2021-05-02 23:34:04,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:34:04,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:34:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2031, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:34:04,909 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:08,643 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-05-02 23:34:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:34:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2021-05-02 23:34:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:08,646 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:34:08,646 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:34:08,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 3781.7ms TimeCoverageRelationStatistics Valid=476, Invalid=8454, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:34:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:34:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-05-02 23:34:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.098360655737705) internal successors, (67), 62 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-05-02 23:34:08,658 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 63 [2021-05-02 23:34:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:08,658 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-05-02 23:34:08,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:08,658 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-05-02 23:34:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:34:08,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:08,658 INFO L523 BasicCegarLoop]: trace histogram [31, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:08,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:34:08,659 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 513941637, now seen corresponding path program 32 times [2021-05-02 23:34:08,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:08,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997171871] [2021-05-02 23:34:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:08,665 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1196 v_main_~n0~0_74) InVars {main_~i0~0=v_main_~i0~0_1196, main_~n0~0=v_main_~n0~0_74} OutVars{main_~i0~0=v_main_~i0~0_1196, main_~n0~0=v_main_~n0~0_74} AuxVars[] AssignedVars[] [2021-05-02 23:34:08,682 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:08,703 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:08,710 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:08,724 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:08,744 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:08,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:08,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:34:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:08,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:34:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:10,247 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:10,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997171871] [2021-05-02 23:34:10,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997171871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:10,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:10,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:34:10,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400203946] [2021-05-02 23:34:10,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:34:10,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:10,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:34:10,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2002, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:34:10,248 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:13,436 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-05-02 23:34:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:34:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2021-05-02 23:34:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:13,437 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:34:13,437 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:34:13,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 3434.6ms TimeCoverageRelationStatistics Valid=494, Invalid=7878, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:34:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:34:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 23:34:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-05-02 23:34:13,447 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 63 [2021-05-02 23:34:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:13,447 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-05-02 23:34:13,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-05-02 23:34:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:34:13,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:13,447 INFO L523 BasicCegarLoop]: trace histogram [33, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:13,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:34:13,447 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1094873508, now seen corresponding path program 33 times [2021-05-02 23:34:13,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:13,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667895905] [2021-05-02 23:34:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:13,452 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1230 v_main_~n0~0_75) InVars {main_~i0~0=v_main_~i0~0_1230, main_~n0~0=v_main_~n0~0_75} OutVars{main_~i0~0=v_main_~i0~0_1230, main_~n0~0=v_main_~n0~0_75} AuxVars[] AssignedVars[] [2021-05-02 23:34:13,453 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:13,454 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:13,461 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:13,489 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:13,508 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:13,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:13,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:34:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:13,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:34:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:15,046 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667895905] [2021-05-02 23:34:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [667895905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:15,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:15,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:34:15,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178008862] [2021-05-02 23:34:15,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:34:15,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:34:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:34:15,048 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:18,632 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-05-02 23:34:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:34:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 64 [2021-05-02 23:34:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:18,634 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:34:18,634 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:34:18,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 3688.6ms TimeCoverageRelationStatistics Valid=524, Invalid=8406, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:34:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:34:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-02 23:34:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 61 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-05-02 23:34:18,644 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 64 [2021-05-02 23:34:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:18,644 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-05-02 23:34:18,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-05-02 23:34:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:34:18,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:18,645 INFO L523 BasicCegarLoop]: trace histogram [32, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:18,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:34:18,645 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1055098109, now seen corresponding path program 33 times [2021-05-02 23:34:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:18,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561090071] [2021-05-02 23:34:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:18,650 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1266 v_main_~n0~0_76) InVars {main_~i0~0=v_main_~i0~0_1266, main_~n0~0=v_main_~n0~0_76} OutVars{main_~i0~0=v_main_~i0~0_1266, main_~n0~0=v_main_~n0~0_76} AuxVars[] AssignedVars[] [2021-05-02 23:34:18,651 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:18,652 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:18,659 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:18,687 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:18,714 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:18,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:18,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:34:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:18,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:34:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:20,258 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:20,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561090071] [2021-05-02 23:34:20,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561090071] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:20,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:20,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:34:20,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036768035] [2021-05-02 23:34:20,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:34:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:20,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:34:20,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:34:20,259 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:23,558 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-05-02 23:34:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:34:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 64 [2021-05-02 23:34:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:23,560 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:34:23,560 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 23:34:23,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 3534.4ms TimeCoverageRelationStatistics Valid=481, Invalid=7891, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:34:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 23:34:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 23:34:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-05-02 23:34:23,570 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2021-05-02 23:34:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:23,570 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-05-02 23:34:23,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-05-02 23:34:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:34:23,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:23,570 INFO L523 BasicCegarLoop]: trace histogram [34, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:23,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:34:23,571 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash -300718362, now seen corresponding path program 34 times [2021-05-02 23:34:23,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:23,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723580927] [2021-05-02 23:34:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:23,575 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1301 v_main_~n0~0_77) InVars {main_~i0~0=v_main_~i0~0_1301, main_~n0~0=v_main_~n0~0_77} OutVars{main_~i0~0=v_main_~i0~0_1301, main_~n0~0=v_main_~n0~0_77} AuxVars[] AssignedVars[] [2021-05-02 23:34:23,577 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:23,593 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:23,600 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:23,615 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:23,636 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:34:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:34:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:25,303 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:25,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723580927] [2021-05-02 23:34:25,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723580927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:25,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:25,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:34:25,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088943024] [2021-05-02 23:34:25,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:34:25,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:34:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2183, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:34:25,304 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 46 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:29,335 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-05-02 23:34:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:34:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 46 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2021-05-02 23:34:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:29,336 INFO L225 Difference]: With dead ends: 97 [2021-05-02 23:34:29,337 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 23:34:29,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 4095.6ms TimeCoverageRelationStatistics Valid=535, Invalid=8777, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:34:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 23:34:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-02 23:34:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-05-02 23:34:29,346 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 65 [2021-05-02 23:34:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:29,347 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-05-02 23:34:29,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 46 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-05-02 23:34:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:34:29,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:29,347 INFO L523 BasicCegarLoop]: trace histogram [33, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:29,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:34:29,347 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1844277317, now seen corresponding path program 34 times [2021-05-02 23:34:29,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100830635] [2021-05-02 23:34:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:29,352 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1338 v_main_~n0~0_78) InVars {main_~i0~0=v_main_~i0~0_1338, main_~n0~0=v_main_~n0~0_78} OutVars{main_~i0~0=v_main_~i0~0_1338, main_~n0~0=v_main_~n0~0_78} AuxVars[] AssignedVars[] [2021-05-02 23:34:29,353 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:29,370 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:29,377 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:29,391 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:29,411 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:29,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:29,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:34:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:29,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:34:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:29,583 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 23:34:30,984 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:30,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100830635] [2021-05-02 23:34:30,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100830635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:30,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:30,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:34:30,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966677713] [2021-05-02 23:34:30,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:34:30,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:30,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:34:30,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2184, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:34:30,985 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 46 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:34,535 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-05-02 23:34:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:34:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 46 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2021-05-02 23:34:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:34,536 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:34:34,537 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:34:34,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 3688.9ms TimeCoverageRelationStatistics Valid=505, Invalid=8615, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:34:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:34:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-05-02 23:34:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-05-02 23:34:34,549 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 65 [2021-05-02 23:34:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:34,551 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-05-02 23:34:34,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 46 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-05-02 23:34:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:34:34,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:34,552 INFO L523 BasicCegarLoop]: trace histogram [35, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:34,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:34:34,552 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash -614393372, now seen corresponding path program 35 times [2021-05-02 23:34:34,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:34,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867418996] [2021-05-02 23:34:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:34,556 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1374 v_main_~n0~0_79) InVars {main_~i0~0=v_main_~i0~0_1374, main_~n0~0=v_main_~n0~0_79} OutVars{main_~i0~0=v_main_~i0~0_1374, main_~n0~0=v_main_~n0~0_79} AuxVars[] AssignedVars[] [2021-05-02 23:34:34,574 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:34,585 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:34,590 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:34,599 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:34,615 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:34,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:34:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:34,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:34:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:35,869 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:35,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867418996] [2021-05-02 23:34:35,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867418996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:35,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:35,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:34:35,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949441818] [2021-05-02 23:34:35,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:34:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:35,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:34:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2277, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:34:35,870 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:40,235 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-05-02 23:34:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:34:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2021-05-02 23:34:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:40,236 INFO L225 Difference]: With dead ends: 101 [2021-05-02 23:34:40,237 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 23:34:40,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 3964.8ms TimeCoverageRelationStatistics Valid=570, Invalid=9530, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:34:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 23:34:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-05-02 23:34:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-05-02 23:34:40,249 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 66 [2021-05-02 23:34:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:40,250 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-05-02 23:34:40,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-05-02 23:34:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:34:40,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:40,250 INFO L523 BasicCegarLoop]: trace histogram [34, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:40,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:34:40,250 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1530602307, now seen corresponding path program 35 times [2021-05-02 23:34:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:40,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568711177] [2021-05-02 23:34:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:40,255 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1412 v_main_~n0~0_80) InVars {main_~i0~0=v_main_~i0~0_1412, main_~n0~0=v_main_~n0~0_80} OutVars{main_~i0~0=v_main_~i0~0_1412, main_~n0~0=v_main_~n0~0_80} AuxVars[] AssignedVars[] [2021-05-02 23:34:40,257 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:40,258 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:40,265 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:40,296 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:40,318 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:40,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:40,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:34:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:40,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:34:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:40,496 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 23:34:41,996 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:41,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568711177] [2021-05-02 23:34:41,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [568711177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:41,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:41,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:34:41,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874651901] [2021-05-02 23:34:41,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:34:41,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:34:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2278, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:34:41,997 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:45,925 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-05-02 23:34:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:34:45,926 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2021-05-02 23:34:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:45,927 INFO L225 Difference]: With dead ends: 97 [2021-05-02 23:34:45,927 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 23:34:45,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4059.4ms TimeCoverageRelationStatistics Valid=527, Invalid=8979, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:34:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 23:34:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-02 23:34:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-05-02 23:34:45,937 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 66 [2021-05-02 23:34:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:45,937 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-05-02 23:34:45,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-05-02 23:34:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:34:45,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:45,938 INFO L523 BasicCegarLoop]: trace histogram [36, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:45,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:34:45,938 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1748384090, now seen corresponding path program 36 times [2021-05-02 23:34:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:45,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163107692] [2021-05-02 23:34:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:45,943 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1449 v_main_~n0~0_81) InVars {main_~i0~0=v_main_~i0~0_1449, main_~n0~0=v_main_~n0~0_81} OutVars{main_~i0~0=v_main_~i0~0_1449, main_~n0~0=v_main_~n0~0_81} AuxVars[] AssignedVars[] [2021-05-02 23:34:45,944 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:45,963 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:45,971 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:45,987 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:46,010 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:46,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:46,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:34:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:34:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:47,965 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163107692] [2021-05-02 23:34:47,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163107692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:47,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:47,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:34:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635275356] [2021-05-02 23:34:47,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:34:47,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:34:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2407, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:34:47,966 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:52,881 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-05-02 23:34:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:34:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 67 [2021-05-02 23:34:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:52,883 INFO L225 Difference]: With dead ends: 99 [2021-05-02 23:34:52,883 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:34:52,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 4815.9ms TimeCoverageRelationStatistics Valid=488, Invalid=9612, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:34:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:34:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-05-02 23:34:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-05-02 23:34:52,894 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 67 [2021-05-02 23:34:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:52,897 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-05-02 23:34:52,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-05-02 23:34:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:34:52,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:52,898 INFO L523 BasicCegarLoop]: trace histogram [35, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:52,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:34:52,898 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:52,903 INFO L82 PathProgramCache]: Analyzing trace with hash 396611589, now seen corresponding path program 36 times [2021-05-02 23:34:52,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:52,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587658994] [2021-05-02 23:34:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:52,908 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1488 v_main_~n0~0_82) InVars {main_~i0~0=v_main_~i0~0_1488, main_~n0~0=v_main_~n0~0_82} OutVars{main_~i0~0=v_main_~i0~0_1488, main_~n0~0=v_main_~n0~0_82} AuxVars[] AssignedVars[] [2021-05-02 23:34:52,913 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:52,915 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:52,923 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:52,963 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:52,985 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:53,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:53,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:34:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:53,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:34:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:55,196 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587658994] [2021-05-02 23:34:55,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [587658994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:55,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:55,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:34:55,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019136166] [2021-05-02 23:34:55,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:34:55,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:55,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:34:55,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2407, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:34:55,198 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:59,704 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-05-02 23:34:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:34:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 67 [2021-05-02 23:34:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:59,706 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:34:59,706 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:34:59,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 4800.2ms TimeCoverageRelationStatistics Valid=449, Invalid=9057, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:34:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:34:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 23:34:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:34:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-05-02 23:34:59,722 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 67 [2021-05-02 23:34:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:59,722 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-05-02 23:34:59,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:34:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-05-02 23:34:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:34:59,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:59,723 INFO L523 BasicCegarLoop]: trace histogram [37, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:59,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:34:59,723 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1752609316, now seen corresponding path program 37 times [2021-05-02 23:34:59,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:59,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711020631] [2021-05-02 23:34:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:59,728 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1526 v_main_~n0~0_83) InVars {main_~i0~0=v_main_~i0~0_1526, main_~n0~0=v_main_~n0~0_83} OutVars{main_~i0~0=v_main_~i0~0_1526, main_~n0~0=v_main_~n0~0_83} AuxVars[] AssignedVars[] [2021-05-02 23:34:59,730 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:34:59,748 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:59,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:59,772 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:34:59,794 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:59,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:59,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:34:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:59,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:34:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:01,814 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711020631] [2021-05-02 23:35:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711020631] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:01,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:01,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:35:01,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902425886] [2021-05-02 23:35:01,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:35:01,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:35:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2508, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:35:01,815 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:06,678 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2021-05-02 23:35:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:35:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.14) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-05-02 23:35:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:06,679 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:35:06,679 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:35:06,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 4986.4ms TimeCoverageRelationStatistics Valid=495, Invalid=10011, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:35:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:35:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 23:35:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.078125) internal successors, (69), 65 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-05-02 23:35:06,691 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 68 [2021-05-02 23:35:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:06,691 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-05-02 23:35:06,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.14) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-05-02 23:35:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:35:06,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:06,692 INFO L523 BasicCegarLoop]: trace histogram [36, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:06,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:35:06,692 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:06,693 INFO L82 PathProgramCache]: Analyzing trace with hash -397362301, now seen corresponding path program 37 times [2021-05-02 23:35:06,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:06,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613035097] [2021-05-02 23:35:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:06,698 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1566 v_main_~n0~0_84) InVars {main_~i0~0=v_main_~i0~0_1566, main_~n0~0=v_main_~n0~0_84} OutVars{main_~i0~0=v_main_~i0~0_1566, main_~n0~0=v_main_~n0~0_84} AuxVars[] AssignedVars[] [2021-05-02 23:35:06,700 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:06,719 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:06,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:06,747 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:06,771 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:35:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:35:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:08,900 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613035097] [2021-05-02 23:35:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1613035097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:08,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:35:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011047268] [2021-05-02 23:35:08,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:35:08,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:35:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2472, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:35:08,901 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:13,310 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-05-02 23:35:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:35:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.14) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-05-02 23:35:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:13,312 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:35:13,312 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:35:13,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 4711.6ms TimeCoverageRelationStatistics Valid=525, Invalid=9375, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:35:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:35:13,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 23:35:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-05-02 23:35:13,325 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2021-05-02 23:35:13,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:13,325 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-05-02 23:35:13,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.14) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-05-02 23:35:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:35:13,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:13,325 INFO L523 BasicCegarLoop]: trace histogram [38, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:13,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:35:13,325 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1385744794, now seen corresponding path program 38 times [2021-05-02 23:35:13,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:13,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869464720] [2021-05-02 23:35:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:13,332 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1605 v_main_~n0~0_85) InVars {main_~i0~0=v_main_~i0~0_1605, main_~n0~0=v_main_~n0~0_85} OutVars{main_~i0~0=v_main_~i0~0_1605, main_~n0~0=v_main_~n0~0_85} AuxVars[] AssignedVars[] [2021-05-02 23:35:13,334 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:13,335 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:13,344 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:13,379 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:13,405 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:13,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:35:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:13,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:35:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:15,604 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:15,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869464720] [2021-05-02 23:35:15,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869464720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:15,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:15,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:35:15,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375128912] [2021-05-02 23:35:15,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:35:15,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:15,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:35:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2609, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:35:15,606 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:21,063 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-05-02 23:35:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:35:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2021-05-02 23:35:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:21,065 INFO L225 Difference]: With dead ends: 101 [2021-05-02 23:35:21,065 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 23:35:21,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 5521.3ms TimeCoverageRelationStatistics Valid=504, Invalid=10416, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:35:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 23:35:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-05-02 23:35:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 66 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-05-02 23:35:21,077 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 69 [2021-05-02 23:35:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:21,077 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-05-02 23:35:21,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-05-02 23:35:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:35:21,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:21,078 INFO L523 BasicCegarLoop]: trace histogram [37, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:21,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:35:21,078 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash 759250885, now seen corresponding path program 38 times [2021-05-02 23:35:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:21,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395769909] [2021-05-02 23:35:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:21,084 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1646 v_main_~n0~0_86) InVars {main_~i0~0=v_main_~i0~0_1646, main_~n0~0=v_main_~n0~0_86} OutVars{main_~i0~0=v_main_~i0~0_1646, main_~n0~0=v_main_~n0~0_86} AuxVars[] AssignedVars[] [2021-05-02 23:35:21,086 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:21,108 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:21,116 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:21,133 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:21,159 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:21,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:35:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:35:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:23,390 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395769909] [2021-05-02 23:35:23,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395769909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:23,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:23,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:35:23,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242620979] [2021-05-02 23:35:23,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:35:23,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:35:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2572, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:35:23,392 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:28,506 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-05-02 23:35:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:35:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2021-05-02 23:35:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:28,508 INFO L225 Difference]: With dead ends: 99 [2021-05-02 23:35:28,508 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 23:35:28,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 5186.4ms TimeCoverageRelationStatistics Valid=549, Invalid=10163, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:35:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 23:35:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-05-02 23:35:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 68 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-05-02 23:35:28,522 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 69 [2021-05-02 23:35:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:28,522 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-05-02 23:35:28,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-05-02 23:35:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:35:28,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:28,523 INFO L523 BasicCegarLoop]: trace histogram [39, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:28,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:35:28,523 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash 109525604, now seen corresponding path program 39 times [2021-05-02 23:35:28,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:28,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698651158] [2021-05-02 23:35:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:28,528 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1686 v_main_~n0~0_87) InVars {main_~i0~0=v_main_~i0~0_1686, main_~n0~0=v_main_~n0~0_87} OutVars{main_~i0~0=v_main_~i0~0_1686, main_~n0~0=v_main_~n0~0_87} AuxVars[] AssignedVars[] [2021-05-02 23:35:28,530 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:28,549 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:28,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:28,574 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:28,599 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:28,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:35:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:35:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:31,036 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:31,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698651158] [2021-05-02 23:35:31,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698651158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:31,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:31,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:35:31,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769621866] [2021-05-02 23:35:31,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:35:31,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:31,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:35:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2673, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:35:31,038 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:37,343 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-05-02 23:35:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:35:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 70 [2021-05-02 23:35:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:37,345 INFO L225 Difference]: With dead ends: 105 [2021-05-02 23:35:37,345 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:35:37,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 6222.7ms TimeCoverageRelationStatistics Valid=614, Invalid=11158, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:35:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:35:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-05-02 23:35:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.088235294117647) internal successors, (74), 69 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-05-02 23:35:37,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 70 [2021-05-02 23:35:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:37,360 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-05-02 23:35:37,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-05-02 23:35:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:35:37,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:37,361 INFO L523 BasicCegarLoop]: trace histogram [38, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:37,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:35:37,361 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2040446013, now seen corresponding path program 39 times [2021-05-02 23:35:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:37,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524076972] [2021-05-02 23:35:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:37,366 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1728 v_main_~n0~0_88) InVars {main_~i0~0=v_main_~i0~0_1728, main_~n0~0=v_main_~n0~0_88} OutVars{main_~i0~0=v_main_~i0~0_1728, main_~n0~0=v_main_~n0~0_88} AuxVars[] AssignedVars[] [2021-05-02 23:35:37,368 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:37,369 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:37,376 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:37,409 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:37,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:37,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:35:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:37,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:35:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:39,929 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:39,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524076972] [2021-05-02 23:35:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524076972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:39,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:39,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:35:39,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583667433] [2021-05-02 23:35:39,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:35:39,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:39,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:35:39,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2710, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:35:39,931 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:45,840 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-05-02 23:35:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:35:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 70 [2021-05-02 23:35:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:45,841 INFO L225 Difference]: With dead ends: 101 [2021-05-02 23:35:45,841 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 23:35:45,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 5849.0ms TimeCoverageRelationStatistics Valid=500, Invalid=10630, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:35:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 23:35:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-02 23:35:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-05-02 23:35:45,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 70 [2021-05-02 23:35:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:45,854 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-05-02 23:35:45,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-05-02 23:35:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:35:45,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:45,854 INFO L523 BasicCegarLoop]: trace histogram [40, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:45,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:35:45,854 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash -781732314, now seen corresponding path program 40 times [2021-05-02 23:35:45,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:45,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642964860] [2021-05-02 23:35:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:45,860 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1769 v_main_~n0~0_89) InVars {main_~i0~0=v_main_~i0~0_1769, main_~n0~0=v_main_~n0~0_89} OutVars{main_~i0~0=v_main_~i0~0_1769, main_~n0~0=v_main_~n0~0_89} AuxVars[] AssignedVars[] [2021-05-02 23:35:45,862 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:45,883 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:45,891 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:45,908 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:45,935 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:46,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:46,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:35:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:46,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:35:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:48,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:48,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642964860] [2021-05-02 23:35:48,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [642964860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:48,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:48,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:35:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638519939] [2021-05-02 23:35:48,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:35:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:35:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2777, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:35:48,480 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:54,550 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-05-02 23:35:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:35:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-05-02 23:35:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:54,553 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:35:54,553 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:35:54,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 6193.5ms TimeCoverageRelationStatistics Valid=601, Invalid=11171, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:35:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:35:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2021-05-02 23:35:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 68 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:35:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-05-02 23:35:54,566 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 71 [2021-05-02 23:35:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:54,566 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-05-02 23:35:54,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:35:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-05-02 23:35:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:35:54,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:54,567 INFO L523 BasicCegarLoop]: trace histogram [39, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:54,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:35:54,567 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1363263365, now seen corresponding path program 40 times [2021-05-02 23:35:54,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:54,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658616420] [2021-05-02 23:35:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:54,581 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1812 v_main_~n0~0_90) InVars {main_~i0~0=v_main_~i0~0_1812, main_~n0~0=v_main_~n0~0_90} OutVars{main_~i0~0=v_main_~i0~0_1812, main_~n0~0=v_main_~n0~0_90} AuxVars[] AssignedVars[] [2021-05-02 23:35:54,583 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:35:54,607 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:54,616 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:54,636 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:35:54,662 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:54,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:35:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:54,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:35:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:57,208 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:57,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658616420] [2021-05-02 23:35:57,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [658616420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:57,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:57,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:35:57,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505637475] [2021-05-02 23:35:57,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:35:57,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:35:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2815, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:35:57,209 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:03,036 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-05-02 23:36:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:36:03,038 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-05-02 23:36:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:03,038 INFO L225 Difference]: With dead ends: 99 [2021-05-02 23:36:03,038 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:36:03,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 5969.7ms TimeCoverageRelationStatistics Valid=485, Invalid=10645, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:36:03,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:36:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 23:36:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:36:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-05-02 23:36:03,052 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 71 [2021-05-02 23:36:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:03,053 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-05-02 23:36:03,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-05-02 23:36:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:36:03,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:03,053 INFO L523 BasicCegarLoop]: trace histogram [41, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:03,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:36:03,053 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:03,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1654043300, now seen corresponding path program 41 times [2021-05-02 23:36:03,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:03,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994786544] [2021-05-02 23:36:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:03,060 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1854 v_main_~n0~0_91) InVars {main_~i0~0=v_main_~i0~0_1854, main_~n0~0=v_main_~n0~0_91} OutVars{main_~i0~0=v_main_~i0~0_1854, main_~n0~0=v_main_~n0~0_91} AuxVars[] AssignedVars[] [2021-05-02 23:36:03,063 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:36:03,064 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,074 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:03,112 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:36:03,139 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:36:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:36:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:05,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:05,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994786544] [2021-05-02 23:36:05,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994786544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:05,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:05,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:36:05,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243417893] [2021-05-02 23:36:05,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:36:05,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:36:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2883, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:36:05,950 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:12,057 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-05-02 23:36:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:12,661 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-05-02 23:36:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:36:12,662 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-05-02 23:36:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:12,663 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:36:12,663 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:36:12,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 6783.9ms TimeCoverageRelationStatistics Valid=612, Invalid=11598, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:36:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:36:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2021-05-02 23:36:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 69 states have internal predecessors, (73), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:36:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-05-02 23:36:12,676 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 72 [2021-05-02 23:36:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:12,676 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-05-02 23:36:12,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-05-02 23:36:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:36:12,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:12,677 INFO L523 BasicCegarLoop]: trace histogram [40, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:12,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:36:12,677 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash -495928317, now seen corresponding path program 41 times [2021-05-02 23:36:12,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:12,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711879756] [2021-05-02 23:36:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:12,684 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1898 v_main_~n0~0_92) InVars {main_~i0~0=v_main_~i0~0_1898, main_~n0~0=v_main_~n0~0_92} OutVars{main_~i0~0=v_main_~i0~0_1898, main_~n0~0=v_main_~n0~0_92} AuxVars[] AssignedVars[] [2021-05-02 23:36:12,686 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:36:12,687 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:12,697 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:12,735 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:36:12,761 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:12,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:12,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:36:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:12,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:36:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:15,635 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:15,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711879756] [2021-05-02 23:36:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [711879756] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:15,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:15,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:36:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430687045] [2021-05-02 23:36:15,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:36:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:36:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2922, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:36:15,637 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:22,315 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-05-02 23:36:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:36:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-05-02 23:36:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:22,318 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:36:22,318 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 23:36:22,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 6769.8ms TimeCoverageRelationStatistics Valid=494, Invalid=11062, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:36:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 23:36:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 23:36:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:36:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-05-02 23:36:22,331 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 72 [2021-05-02 23:36:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:22,331 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-05-02 23:36:22,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-05-02 23:36:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:36:22,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:22,331 INFO L523 BasicCegarLoop]: trace histogram [42, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:22,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:36:22,332 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:22,332 INFO L82 PathProgramCache]: Analyzing trace with hash -146323994, now seen corresponding path program 42 times [2021-05-02 23:36:22,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:22,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132905202] [2021-05-02 23:36:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:22,338 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1941 v_main_~n0~0_93) InVars {main_~i0~0=v_main_~i0~0_1941, main_~n0~0=v_main_~n0~0_93} OutVars{main_~i0~0=v_main_~i0~0_1941, main_~n0~0=v_main_~n0~0_93} AuxVars[] AssignedVars[] [2021-05-02 23:36:22,340 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:36:22,342 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:22,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:22,390 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:36:22,418 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:22,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:22,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:36:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:22,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:36:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:25,633 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:25,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132905202] [2021-05-02 23:36:25,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132905202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:25,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:25,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:36:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714325858] [2021-05-02 23:36:25,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:36:25,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:36:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2991, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:36:25,635 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:32,322 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:36:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:32,952 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-05-02 23:36:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:36:32,953 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2021-05-02 23:36:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:32,954 INFO L225 Difference]: With dead ends: 105 [2021-05-02 23:36:32,954 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:36:32,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 7453.0ms TimeCoverageRelationStatistics Valid=623, Invalid=12033, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:36:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:36:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-05-02 23:36:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 70 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:36:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-05-02 23:36:32,993 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 73 [2021-05-02 23:36:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:32,993 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-05-02 23:36:32,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-05-02 23:36:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:36:32,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:32,993 INFO L523 BasicCegarLoop]: trace histogram [41, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:32,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:36:32,994 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1998671685, now seen corresponding path program 42 times [2021-05-02 23:36:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:32,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417809924] [2021-05-02 23:36:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:33,005 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_1986 v_main_~n0~0_94) InVars {main_~i0~0=v_main_~i0~0_1986, main_~n0~0=v_main_~n0~0_94} OutVars{main_~i0~0=v_main_~i0~0_1986, main_~n0~0=v_main_~n0~0_94} AuxVars[] AssignedVars[] [2021-05-02 23:36:33,007 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:36:33,008 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:33,018 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:33,057 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:36:33,089 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:33,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:33,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:36:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:33,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:36:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:35,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:35,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417809924] [2021-05-02 23:36:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417809924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:35,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:35,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:36:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464157152] [2021-05-02 23:36:35,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:36:35,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:36:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2992, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:36:35,984 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:43,377 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-05-02 23:36:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:36:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2021-05-02 23:36:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:43,379 INFO L225 Difference]: With dead ends: 101 [2021-05-02 23:36:43,379 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:36:43,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 6826.6ms TimeCoverageRelationStatistics Valid=580, Invalid=11410, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:36:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:36:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 23:36:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:36:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-05-02 23:36:43,417 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2021-05-02 23:36:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:43,417 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-05-02 23:36:43,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-05-02 23:36:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:36:43,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:43,417 INFO L523 BasicCegarLoop]: trace histogram [43, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:43,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:36:43,418 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:43,418 INFO L82 PathProgramCache]: Analyzing trace with hash -123135260, now seen corresponding path program 43 times [2021-05-02 23:36:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:43,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649645870] [2021-05-02 23:36:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:43,425 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2030 v_main_~n0~0_95) InVars {main_~i0~0=v_main_~i0~0_2030, main_~n0~0=v_main_~n0~0_95} OutVars{main_~i0~0=v_main_~i0~0_2030, main_~n0~0=v_main_~n0~0_95} AuxVars[] AssignedVars[] [2021-05-02 23:36:43,430 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:36:43,454 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:43,464 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:43,485 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:36:43,519 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:43,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:43,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:36:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:43,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:36:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:47,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649645870] [2021-05-02 23:36:47,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [649645870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:47,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:47,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:36:47,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523596993] [2021-05-02 23:36:47,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:36:47,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:36:47,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:36:47,141 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:54,454 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:36:54,746 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:36:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:55,417 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-05-02 23:36:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:36:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.125) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2021-05-02 23:36:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:55,420 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:36:55,420 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:36:55,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 8427.8ms TimeCoverageRelationStatistics Valid=634, Invalid=12476, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:36:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:36:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2021-05-02 23:36:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:36:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-05-02 23:36:55,434 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 74 [2021-05-02 23:36:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:55,434 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-05-02 23:36:55,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.125) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:36:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-05-02 23:36:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:36:55,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:55,435 INFO L523 BasicCegarLoop]: trace histogram [42, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:55,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:36:55,435 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:55,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2021860419, now seen corresponding path program 43 times [2021-05-02 23:36:55,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:55,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720916407] [2021-05-02 23:36:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:55,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2076 v_main_~n0~0_96) InVars {main_~i0~0=v_main_~i0~0_2076, main_~n0~0=v_main_~n0~0_96} OutVars{main_~i0~0=v_main_~i0~0_2076, main_~n0~0=v_main_~n0~0_96} AuxVars[] AssignedVars[] [2021-05-02 23:36:55,445 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:36:55,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:55,457 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:55,498 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:36:55,532 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:36:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:55,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:36:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:58,809 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:58,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720916407] [2021-05-02 23:36:58,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [720916407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:58,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:58,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:36:58,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227526526] [2021-05-02 23:36:58,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:36:58,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:36:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:36:58,811 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:06,865 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-05-02 23:37:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:37:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.125) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2021-05-02 23:37:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:06,867 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:37:06,867 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:37:06,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 7895.4ms TimeCoverageRelationStatistics Valid=512, Invalid=11920, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:37:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:37:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-02 23:37:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:37:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-05-02 23:37:06,895 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 74 [2021-05-02 23:37:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:06,895 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-05-02 23:37:06,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.125) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-05-02 23:37:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:37:06,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:06,913 INFO L523 BasicCegarLoop]: trace histogram [44, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:06,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:37:06,913 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 595715494, now seen corresponding path program 44 times [2021-05-02 23:37:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:06,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896330463] [2021-05-02 23:37:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:06,920 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2121 v_main_~n0~0_97) InVars {main_~i0~0=v_main_~i0~0_2121, main_~n0~0=v_main_~n0~0_97} OutVars{main_~i0~0=v_main_~i0~0_2121, main_~n0~0=v_main_~n0~0_97} AuxVars[] AssignedVars[] [2021-05-02 23:37:06,923 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:37:06,925 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:06,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:07,003 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:37:07,079 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:37:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:07,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:37:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:07,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:37:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:11,384 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896330463] [2021-05-02 23:37:11,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896330463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:11,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:11,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:37:11,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174154510] [2021-05-02 23:37:11,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:37:11,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:11,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:37:11,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3213, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:37:11,386 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:18,599 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-05-02 23:37:19,007 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-05-02 23:37:19,193 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-02 23:37:19,421 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-02 23:37:19,815 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-02 23:37:20,156 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-05-02 23:37:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:21,110 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2021-05-02 23:37:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:37:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2021-05-02 23:37:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:21,112 INFO L225 Difference]: With dead ends: 107 [2021-05-02 23:37:21,113 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 23:37:21,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 9691.3ms TimeCoverageRelationStatistics Valid=645, Invalid=12927, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:37:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 23:37:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-05-02 23:37:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:37:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-05-02 23:37:21,160 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 75 [2021-05-02 23:37:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:21,161 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-05-02 23:37:21,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-05-02 23:37:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:37:21,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:21,161 INFO L523 BasicCegarLoop]: trace histogram [43, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:21,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:37:21,162 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1554256123, now seen corresponding path program 44 times [2021-05-02 23:37:21,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:21,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751170558] [2021-05-02 23:37:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:21,169 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2168 v_main_~n0~0_98) InVars {main_~i0~0=v_main_~i0~0_2168, main_~n0~0=v_main_~n0~0_98} OutVars{main_~i0~0=v_main_~i0~0_2168, main_~n0~0=v_main_~n0~0_98} AuxVars[] AssignedVars[] [2021-05-02 23:37:21,171 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:37:21,173 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,185 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:21,246 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:37:21,282 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:37:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:21,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:21,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:37:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:21,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:37:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:25,694 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751170558] [2021-05-02 23:37:25,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751170558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:25,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:25,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:37:25,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036327318] [2021-05-02 23:37:25,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:37:25,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:37:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3214, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:37:25,696 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:33,955 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:37:34,577 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:37:34,824 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-02 23:37:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:35,615 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-05-02 23:37:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:37:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2021-05-02 23:37:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:35,619 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:37:35,619 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:37:35,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 9699.8ms TimeCoverageRelationStatistics Valid=602, Invalid=12280, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:37:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:37:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 23:37:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:37:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-05-02 23:37:35,642 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 75 [2021-05-02 23:37:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:35,642 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-05-02 23:37:35,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-05-02 23:37:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:37:35,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:35,643 INFO L523 BasicCegarLoop]: trace histogram [45, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:35,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:37:35,643 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1405252388, now seen corresponding path program 45 times [2021-05-02 23:37:35,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:35,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861855507] [2021-05-02 23:37:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:35,652 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2214 v_main_~n0~0_99) InVars {main_~i0~0=v_main_~i0~0_2214, main_~n0~0=v_main_~n0~0_99} OutVars{main_~i0~0=v_main_~i0~0_2214, main_~n0~0=v_main_~n0~0_99} AuxVars[] AssignedVars[] [2021-05-02 23:37:35,655 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:37:35,696 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:35,707 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:35,731 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:37:35,769 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:37:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:36,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:37:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:36,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:37:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:40,374 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:40,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861855507] [2021-05-02 23:37:40,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [861855507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:40,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:40,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:37:40,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791759517] [2021-05-02 23:37:40,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:37:40,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:37:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3327, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:37:40,376 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:49,101 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-05-02 23:37:49,564 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:37:49,815 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-02 23:37:50,083 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-02 23:37:50,562 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-02 23:37:51,014 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 23:37:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:51,966 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-05-02 23:37:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:37:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2021-05-02 23:37:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:51,969 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:37:51,969 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:37:51,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 10957.1ms TimeCoverageRelationStatistics Valid=656, Invalid=13386, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:37:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:37:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2021-05-02 23:37:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 73 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:37:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-05-02 23:37:52,000 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 76 [2021-05-02 23:37:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:52,001 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-05-02 23:37:52,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:37:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-05-02 23:37:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:37:52,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:52,001 INFO L523 BasicCegarLoop]: trace histogram [44, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:52,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:37:52,001 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash -744719229, now seen corresponding path program 45 times [2021-05-02 23:37:52,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:52,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747803818] [2021-05-02 23:37:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:52,024 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2262 v_main_~n0~0_100) InVars {main_~i0~0=v_main_~i0~0_2262, main_~n0~0=v_main_~n0~0_100} OutVars{main_~i0~0=v_main_~i0~0_2262, main_~n0~0=v_main_~n0~0_100} AuxVars[] AssignedVars[] [2021-05-02 23:37:52,028 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:37:52,074 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:52,104 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:52,146 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:37:52,239 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:37:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:52,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:52,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:37:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:52,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:37:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:57,698 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:57,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747803818] [2021-05-02 23:37:57,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747803818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:57,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:57,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:37:57,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014229807] [2021-05-02 23:37:57,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:37:57,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:37:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3328, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:37:57,700 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:38:07,249 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:38:07,541 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:38:07,949 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:38:08,198 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-02 23:38:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:09,542 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-05-02 23:38:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:38:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2021-05-02 23:38:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:09,546 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:38:09,546 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 23:38:09,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 11395.7ms TimeCoverageRelationStatistics Valid=613, Invalid=12727, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:38:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 23:38:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 23:38:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:38:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2021-05-02 23:38:09,581 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2021-05-02 23:38:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:09,581 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2021-05-02 23:38:09,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:38:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2021-05-02 23:38:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:38:09,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:09,582 INFO L523 BasicCegarLoop]: trace histogram [46, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:09,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:38:09,582 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash 731092326, now seen corresponding path program 46 times [2021-05-02 23:38:09,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:09,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970470702] [2021-05-02 23:38:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:09,592 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2309 v_main_~n0~0_101) InVars {main_~i0~0=v_main_~i0~0_2309, main_~n0~0=v_main_~n0~0_101} OutVars{main_~i0~0=v_main_~i0~0_2309, main_~n0~0=v_main_~n0~0_101} AuxVars[] AssignedVars[] [2021-05-02 23:38:09,609 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:38:09,646 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:09,662 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:09,693 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:38:09,756 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:38:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:10,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:38:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:10,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:38:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:15,718 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970470702] [2021-05-02 23:38:15,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [970470702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:15,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:15,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:38:15,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646840059] [2021-05-02 23:38:15,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:38:15,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:38:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3443, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:38:15,720 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 58 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:38:26,439 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:38:26,999 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:38:27,318 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:38:27,642 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-02 23:38:28,219 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-02 23:38:28,746 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 23:38:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:29,909 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-05-02 23:38:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:38:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 58 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 77 [2021-05-02 23:38:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:29,914 INFO L225 Difference]: With dead ends: 109 [2021-05-02 23:38:29,914 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 23:38:29,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 13540.8ms TimeCoverageRelationStatistics Valid=667, Invalid=13853, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:38:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 23:38:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-05-02 23:38:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 74 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:38:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-05-02 23:38:29,929 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 77 [2021-05-02 23:38:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:29,930 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-05-02 23:38:29,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 58 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:38:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-05-02 23:38:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:38:29,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:29,930 INFO L523 BasicCegarLoop]: trace histogram [45, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:29,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:38:29,930 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1418879291, now seen corresponding path program 46 times [2021-05-02 23:38:29,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:29,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034181591] [2021-05-02 23:38:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:29,939 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2358 v_main_~n0~0_102) InVars {main_~i0~0=v_main_~i0~0_2358, main_~n0~0=v_main_~n0~0_102} OutVars{main_~i0~0=v_main_~i0~0_2358, main_~n0~0=v_main_~n0~0_102} AuxVars[] AssignedVars[] [2021-05-02 23:38:29,943 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:38:29,945 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:29,959 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:30,019 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:38:30,074 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:38:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:30,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:30,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:38:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:30,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:38:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:35,957 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:35,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034181591] [2021-05-02 23:38:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034181591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:35,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:35,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:38:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710361218] [2021-05-02 23:38:35,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:38:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:38:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3444, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:38:35,959 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 58 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:38:47,534 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-02 23:38:47,845 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-02 23:38:48,103 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-02 23:38:48,424 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-02 23:38:48,868 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-02 23:38:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:50,683 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-05-02 23:38:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:38:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 58 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 77 [2021-05-02 23:38:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:50,686 INFO L225 Difference]: With dead ends: 107 [2021-05-02 23:38:50,686 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 23:38:50,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 13259.0ms TimeCoverageRelationStatistics Valid=637, Invalid=13643, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:38:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 23:38:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-02 23:38:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:38:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-05-02 23:38:50,705 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 77 [2021-05-02 23:38:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:50,705 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-05-02 23:38:50,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 58 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:38:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-05-02 23:38:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:38:50,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:50,707 INFO L523 BasicCegarLoop]: trace histogram [47, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:50,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:38:50,708 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1306966884, now seen corresponding path program 47 times [2021-05-02 23:38:50,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:50,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164726671] [2021-05-02 23:38:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:50,717 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2406 v_main_~n0~0_103) InVars {main_~i0~0=v_main_~i0~0_2406, main_~n0~0=v_main_~n0~0_103} OutVars{main_~i0~0=v_main_~i0~0_2406, main_~n0~0=v_main_~n0~0_103} AuxVars[] AssignedVars[] [2021-05-02 23:38:50,719 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:38:50,721 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:50,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:50,783 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:38:50,828 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:38:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:51,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:51,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:38:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:51,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:38:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:56,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:56,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164726671] [2021-05-02 23:38:56,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164726671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:56,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:56,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:38:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660535434] [2021-05-02 23:38:56,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:38:56,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:56,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:38:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3561, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:38:56,644 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:39:05,169 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:39:05,745 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:39:06,063 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:39:06,618 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:39:06,919 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:39:07,458 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:39:07,936 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:39:08,398 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:39:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:09,551 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-05-02 23:39:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:39:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 78 [2021-05-02 23:39:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:09,555 INFO L225 Difference]: With dead ends: 113 [2021-05-02 23:39:09,555 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:39:09,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 12896.7ms TimeCoverageRelationStatistics Valid=702, Invalid=14798, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:39:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:39:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-05-02 23:39:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 77 states have internal predecessors, (82), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:39:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-05-02 23:39:09,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 78 [2021-05-02 23:39:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:09,586 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-05-02 23:39:09,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:39:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-05-02 23:39:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:39:09,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:09,601 INFO L523 BasicCegarLoop]: trace histogram [46, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:09,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:39:09,601 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:09,602 INFO L82 PathProgramCache]: Analyzing trace with hash -843004733, now seen corresponding path program 47 times [2021-05-02 23:39:09,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:09,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482988493] [2021-05-02 23:39:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:09,626 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2456 v_main_~n0~0_104) InVars {main_~i0~0=v_main_~i0~0_2456, main_~n0~0=v_main_~n0~0_104} OutVars{main_~i0~0=v_main_~i0~0_2456, main_~n0~0=v_main_~n0~0_104} AuxVars[] AssignedVars[] [2021-05-02 23:39:09,629 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:39:09,631 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:09,646 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:09,780 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:39:09,887 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:39:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:10,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:10,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:39:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:10,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:39:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:16,207 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:16,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482988493] [2021-05-02 23:39:16,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [482988493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:16,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:16,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:39:16,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568320257] [2021-05-02 23:39:16,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:39:16,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:39:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3608, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:39:16,217 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:39:28,662 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:39:29,341 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:39:29,626 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:39:29,950 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:39:30,273 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:39:30,736 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:39:31,122 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-02 23:39:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:32,793 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-05-02 23:39:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:39:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 78 [2021-05-02 23:39:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:32,797 INFO L225 Difference]: With dead ends: 109 [2021-05-02 23:39:32,797 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:39:32,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 14677.0ms TimeCoverageRelationStatistics Valid=570, Invalid=14192, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:39:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:39:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 23:39:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:39:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-05-02 23:39:32,813 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 78 [2021-05-02 23:39:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:32,813 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-05-02 23:39:32,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:39:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-05-02 23:39:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:39:32,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:32,814 INFO L523 BasicCegarLoop]: trace histogram [48, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:32,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:39:32,814 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:32,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1979208998, now seen corresponding path program 48 times [2021-05-02 23:39:32,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:32,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806346430] [2021-05-02 23:39:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:32,823 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2505 v_main_~n0~0_105) InVars {main_~i0~0=v_main_~i0~0_2505, main_~n0~0=v_main_~n0~0_105} OutVars{main_~i0~0=v_main_~i0~0_2505, main_~n0~0=v_main_~n0~0_105} AuxVars[] AssignedVars[] [2021-05-02 23:39:32,826 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:39:32,828 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:32,841 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:32,900 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:39:32,954 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:39:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:33,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:39:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:33,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:39:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:39,968 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:39,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806346430] [2021-05-02 23:39:39,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806346430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:39,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:39,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:39:39,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820827316] [2021-05-02 23:39:39,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:39:39,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:39:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3681, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:39:39,970 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 60 states have internal predecessors, (68), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:39:52,161 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:39:52,693 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:39:52,987 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:39:53,294 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:39:53,509 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:39:53,911 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:39:54,397 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:39:55,174 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:39:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:55,548 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2021-05-02 23:39:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:39:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 60 states have internal predecessors, (68), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 79 [2021-05-02 23:39:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:55,552 INFO L225 Difference]: With dead ends: 111 [2021-05-02 23:39:55,552 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:39:55,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 15214.0ms TimeCoverageRelationStatistics Valid=689, Invalid=14811, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:39:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:39:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-05-02 23:39:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:39:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-05-02 23:39:55,567 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 79 [2021-05-02 23:39:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:55,567 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-05-02 23:39:55,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 60 states have internal predecessors, (68), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:39:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-05-02 23:39:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:39:55,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:55,568 INFO L523 BasicCegarLoop]: trace histogram [47, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:55,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:39:55,568 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash -170762619, now seen corresponding path program 48 times [2021-05-02 23:39:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674447784] [2021-05-02 23:39:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:55,577 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2556 v_main_~n0~0_106) InVars {main_~i0~0=v_main_~i0~0_2556, main_~n0~0=v_main_~n0~0_106} OutVars{main_~i0~0=v_main_~i0~0_2556, main_~n0~0=v_main_~n0~0_106} AuxVars[] AssignedVars[] [2021-05-02 23:39:55,580 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:39:55,613 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,628 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:55,658 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:39:55,715 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:39:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:56,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:56,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:39:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:56,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:39:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:02,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:02,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674447784] [2021-05-02 23:40:02,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674447784] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:02,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:02,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:40:02,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730395544] [2021-05-02 23:40:02,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:40:02,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:40:02,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3682, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:40:02,775 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 60 states have internal predecessors, (68), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:40:15,208 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-02 23:40:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:16,038 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-05-02 23:40:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:40:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 60 states have internal predecessors, (68), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 79 [2021-05-02 23:40:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:16,040 INFO L225 Difference]: With dead ends: 109 [2021-05-02 23:40:16,040 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:40:16,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 13813.0ms TimeCoverageRelationStatistics Valid=659, Invalid=14593, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:40:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:40:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-05-02 23:40:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 78 states have internal predecessors, (82), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:40:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-05-02 23:40:16,065 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 79 [2021-05-02 23:40:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:16,066 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-05-02 23:40:16,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 60 states have internal predecessors, (68), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:40:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-05-02 23:40:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:40:16,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:16,074 INFO L523 BasicCegarLoop]: trace histogram [49, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:16,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:40:16,074 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1343878052, now seen corresponding path program 49 times [2021-05-02 23:40:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:16,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232762947] [2021-05-02 23:40:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:16,086 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2606 v_main_~n0~0_107) InVars {main_~i0~0=v_main_~i0~0_2606, main_~n0~0=v_main_~n0~0_107} OutVars{main_~i0~0=v_main_~i0~0_2606, main_~n0~0=v_main_~n0~0_107} AuxVars[] AssignedVars[] [2021-05-02 23:40:16,088 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:40:16,090 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,099 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:16,145 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:40:16,186 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:16,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:16,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:40:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:16,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:40:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:20,658 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:20,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232762947] [2021-05-02 23:40:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232762947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:20,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:20,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:40:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247742084] [2021-05-02 23:40:20,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:40:20,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:40:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3803, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:40:20,660 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:40:30,528 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:40:30,853 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:40:31,338 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:40:31,704 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:40:32,036 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:40:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:32,912 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-05-02 23:40:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:40:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 80 [2021-05-02 23:40:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:32,915 INFO L225 Difference]: With dead ends: 115 [2021-05-02 23:40:32,915 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 23:40:32,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2922 ImplicationChecksByTransitivity, 10929.3ms TimeCoverageRelationStatistics Valid=724, Invalid=15788, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:40:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 23:40:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-05-02 23:40:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 79 states have internal predecessors, (84), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:40:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-05-02 23:40:32,945 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 80 [2021-05-02 23:40:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:32,945 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-05-02 23:40:32,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:40:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-05-02 23:40:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:40:32,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:32,945 INFO L523 BasicCegarLoop]: trace histogram [48, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:32,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:40:32,946 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash -806093565, now seen corresponding path program 49 times [2021-05-02 23:40:32,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:32,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924449538] [2021-05-02 23:40:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:32,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2658 v_main_~n0~0_108) InVars {main_~i0~0=v_main_~i0~0_2658, main_~n0~0=v_main_~n0~0_108} OutVars{main_~i0~0=v_main_~i0~0_2658, main_~n0~0=v_main_~n0~0_108} AuxVars[] AssignedVars[] [2021-05-02 23:40:32,968 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:40:32,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:33,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:33,023 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:40:33,069 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:33,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:40:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:33,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:40:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:33,417 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 23:40:37,952 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924449538] [2021-05-02 23:40:37,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [924449538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:37,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:37,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:40:37,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603506900] [2021-05-02 23:40:37,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:40:37,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:37,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:40:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3804, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:40:37,954 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:40:48,859 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-05-02 23:40:49,322 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-02 23:40:49,521 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-02 23:40:49,969 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-02 23:40:50,234 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-02 23:40:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:51,339 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2021-05-02 23:40:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:40:51,342 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 80 [2021-05-02 23:40:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:51,343 INFO L225 Difference]: With dead ends: 113 [2021-05-02 23:40:51,343 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:40:51,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3097 ImplicationChecksByTransitivity, 11599.1ms TimeCoverageRelationStatistics Valid=696, Invalid=15560, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:40:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:40:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2021-05-02 23:40:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 79 states have internal predecessors, (84), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:40:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-05-02 23:40:51,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 80 [2021-05-02 23:40:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:51,368 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-05-02 23:40:51,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:40:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-05-02 23:40:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:40:51,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:51,371 INFO L523 BasicCegarLoop]: trace histogram [47, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:51,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:40:51,371 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1264263044, now seen corresponding path program 50 times [2021-05-02 23:40:51,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:51,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088894514] [2021-05-02 23:40:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:51,378 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2709 v_main_~n0~0_109) InVars {main_~i0~0=v_main_~i0~0_2709, main_~n0~0=v_main_~n0~0_109} OutVars{main_~i0~0=v_main_~i0~0_2709, main_~n0~0=v_main_~n0~0_109} AuxVars[] AssignedVars[] [2021-05-02 23:40:51,382 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:40:51,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:51,394 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:51,440 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:40:51,488 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:51,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:51,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 23:40:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:51,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 23:40:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:52,084 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:40:57,059 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:57,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088894514] [2021-05-02 23:40:57,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088894514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:57,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:57,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:40:57,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095591871] [2021-05-02 23:40:57,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:40:57,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:57,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:40:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=3482, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:40:57,061 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:41:08,656 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:41:08,905 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-02 23:41:09,180 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-05-02 23:41:09,378 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 23:41:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:10,874 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-05-02 23:41:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:41:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 80 [2021-05-02 23:41:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:10,879 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:41:10,879 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:41:10,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 12246.6ms TimeCoverageRelationStatistics Valid=1508, Invalid=13498, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:41:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:41:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-02 23:41:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.072289156626506) internal successors, (89), 84 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:41:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-05-02 23:41:10,909 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 80 [2021-05-02 23:41:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-05-02 23:41:10,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:41:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-05-02 23:41:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:41:10,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:10,909 INFO L523 BasicCegarLoop]: trace histogram [47, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:10,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:41:10,910 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1694770339, now seen corresponding path program 51 times [2021-05-02 23:41:10,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:10,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969855099] [2021-05-02 23:41:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:10,917 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2759 v_main_~n0~0_110) InVars {main_~i0~0=v_main_~i0~0_2759, main_~n0~0=v_main_~n0~0_110} OutVars{main_~i0~0=v_main_~i0~0_2759, main_~n0~0=v_main_~n0~0_110} AuxVars[] AssignedVars[] [2021-05-02 23:41:10,920 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:41:10,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:10,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:10,995 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:41:11,052 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:11,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:11,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 23:41:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:11,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 23:41:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:11,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 23:41:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:17,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:17,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969855099] [2021-05-02 23:41:17,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969855099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:17,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:17,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:41:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224082411] [2021-05-02 23:41:17,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:41:17,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:41:17,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3928, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:41:17,213 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:41:28,690 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:41:28,946 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:41:29,165 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-02 23:41:29,310 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-02 23:41:29,594 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-02 23:41:30,002 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-02 23:41:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:32,408 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-05-02 23:41:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:41:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 87 [2021-05-02 23:41:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:32,411 INFO L225 Difference]: With dead ends: 123 [2021-05-02 23:41:32,411 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:41:32,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 13072.0ms TimeCoverageRelationStatistics Valid=689, Invalid=15567, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:41:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:41:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-05-02 23:41:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 86 states have internal predecessors, (91), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:41:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-05-02 23:41:32,444 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 87 [2021-05-02 23:41:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:32,444 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-05-02 23:41:32,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:41:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-05-02 23:41:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:41:32,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:32,445 INFO L523 BasicCegarLoop]: trace histogram [50, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:32,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:41:32,445 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash 52866305, now seen corresponding path program 50 times [2021-05-02 23:41:32,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:32,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538680918] [2021-05-02 23:41:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:32,460 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2809 v_main_~n0~0_111) InVars {main_~i0~0=v_main_~i0~0_2809, main_~n0~0=v_main_~n0~0_111} OutVars{main_~i0~0=v_main_~i0~0_2809, main_~n0~0=v_main_~n0~0_111} AuxVars[] AssignedVars[] [2021-05-02 23:41:32,463 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:41:32,465 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:32,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:32,537 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:41:32,596 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:33,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:33,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:41:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:33,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:41:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:33,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 23:41:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:38,700 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538680918] [2021-05-02 23:41:38,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [538680918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:38,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:38,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:41:38,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583285081] [2021-05-02 23:41:38,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:41:38,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:38,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:41:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4101, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:41:38,702 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:41:49,966 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:41:51,355 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:41:52,417 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:41:52,773 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:41:53,227 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:41:53,874 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:41:54,484 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-05-02 23:41:56,041 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:41:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:56,864 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-05-02 23:41:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:41:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 88 [2021-05-02 23:41:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:56,870 INFO L225 Difference]: With dead ends: 133 [2021-05-02 23:41:56,870 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:41:56,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 15044.5ms TimeCoverageRelationStatistics Valid=669, Invalid=17153, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:41:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:41:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2021-05-02 23:41:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 87 states have internal predecessors, (93), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:41:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-05-02 23:41:56,894 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 88 [2021-05-02 23:41:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:56,895 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-05-02 23:41:56,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:41:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-05-02 23:41:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:41:56,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:56,895 INFO L523 BasicCegarLoop]: trace histogram [49, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:56,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:41:56,895 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1362111170, now seen corresponding path program 52 times [2021-05-02 23:41:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:56,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545831483] [2021-05-02 23:41:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:56,906 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2862 v_main_~n0~0_112) InVars {main_~i0~0=v_main_~i0~0_2862, main_~n0~0=v_main_~n0~0_112} OutVars{main_~i0~0=v_main_~i0~0_2862, main_~n0~0=v_main_~n0~0_112} AuxVars[] AssignedVars[] [2021-05-02 23:41:56,909 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:41:56,952 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:56,969 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:57,012 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:41:57,096 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:41:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:41:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:41:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:57,873 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:42:06,310 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:06,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545831483] [2021-05-02 23:42:06,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [545831483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:06,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:06,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:42:06,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336355478] [2021-05-02 23:42:06,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:42:06,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:06,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:42:06,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4101, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:42:06,312 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:42:21,561 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:42:21,816 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:42:22,431 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:42:22,717 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:42:23,040 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:42:23,316 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:42:23,874 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:42:24,271 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-02 23:42:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:25,393 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2021-05-02 23:42:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:42:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 88 [2021-05-02 23:42:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:25,398 INFO L225 Difference]: With dead ends: 129 [2021-05-02 23:42:25,398 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:42:25,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 18822.3ms TimeCoverageRelationStatistics Valid=630, Invalid=16400, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:42:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:42:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 23:42:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:42:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-05-02 23:42:25,433 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 88 [2021-05-02 23:42:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:25,433 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-05-02 23:42:25,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:42:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-05-02 23:42:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:42:25,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:25,434 INFO L523 BasicCegarLoop]: trace histogram [51, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:25,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:42:25,434 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:25,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1910735805, now seen corresponding path program 51 times [2021-05-02 23:42:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:25,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449297181] [2021-05-02 23:42:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:25,455 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2914 v_main_~n0~0_113) InVars {main_~i0~0=v_main_~i0~0_2914, main_~n0~0=v_main_~n0~0_113} OutVars{main_~i0~0=v_main_~i0~0_2914, main_~n0~0=v_main_~n0~0_113} AuxVars[] AssignedVars[] [2021-05-02 23:42:25,458 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:42:25,506 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:25,532 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:25,583 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:42:25,700 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:42:25,703 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:42:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:42:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 23:42:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:32,672 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:32,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449297181] [2021-05-02 23:42:32,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449297181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:32,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:32,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:42:32,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428490287] [2021-05-02 23:42:32,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:42:32,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:42:32,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4181, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:42:32,674 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:42:46,274 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:42:46,880 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:42:47,166 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:42:47,496 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:42:47,713 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:42:48,151 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:42:48,669 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:42:49,493 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:42:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:49,907 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-05-02 23:42:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:42:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 89 [2021-05-02 23:42:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:49,911 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:42:49,911 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 23:42:49,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3072 ImplicationChecksByTransitivity, 15477.6ms TimeCoverageRelationStatistics Valid=729, Invalid=16563, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:42:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 23:42:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-05-02 23:42:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 84 states have internal predecessors, (88), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:42:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-05-02 23:42:49,927 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 89 [2021-05-02 23:42:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:49,927 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-05-02 23:42:49,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:42:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-05-02 23:42:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:42:49,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:49,927 INFO L523 BasicCegarLoop]: trace histogram [50, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:49,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:42:49,927 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash -601490940, now seen corresponding path program 53 times [2021-05-02 23:42:49,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:49,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514761995] [2021-05-02 23:42:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:49,943 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2968 v_main_~n0~0_114) InVars {main_~i0~0=v_main_~i0~0_2968, main_~n0~0=v_main_~n0~0_114} OutVars{main_~i0~0=v_main_~i0~0_2968, main_~n0~0=v_main_~n0~0_114} AuxVars[] AssignedVars[] [2021-05-02 23:42:49,945 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:42:49,946 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:49,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:50,021 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:42:50,082 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:42:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:42:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:42:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:50,970 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:43:00,688 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514761995] [2021-05-02 23:43:00,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514761995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:00,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:00,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:43:00,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219313769] [2021-05-02 23:43:00,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:43:00,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:00,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:43:00,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4182, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:43:00,690 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:43:17,957 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-02 23:43:18,386 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-05-02 23:43:18,696 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:43:19,124 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:43:19,564 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-02 23:43:20,670 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:43:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:21,009 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-05-02 23:43:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:43:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 89 [2021-05-02 23:43:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:21,012 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:43:21,012 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 23:43:21,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 20172.6ms TimeCoverageRelationStatistics Valid=686, Invalid=15826, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:43:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 23:43:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 23:43:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:43:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-05-02 23:43:21,029 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 89 [2021-05-02 23:43:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:21,029 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-05-02 23:43:21,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:43:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-05-02 23:43:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:43:21,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:21,030 INFO L523 BasicCegarLoop]: trace histogram [52, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:21,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:43:21,030 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1642108225, now seen corresponding path program 52 times [2021-05-02 23:43:21,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:21,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470010741] [2021-05-02 23:43:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:21,040 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_3021 v_main_~n0~0_115) InVars {main_~i0~0=v_main_~i0~0_3021, main_~n0~0=v_main_~n0~0_115} OutVars{main_~i0~0=v_main_~i0~0_3021, main_~n0~0=v_main_~n0~0_115} AuxVars[] AssignedVars[] [2021-05-02 23:43:21,043 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:43:21,088 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:21,107 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:21,144 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:43:21,216 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:21,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:21,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:43:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:43:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:21,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 23:43:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:21,940 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:43:31,197 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:31,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470010741] [2021-05-02 23:43:31,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [470010741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:31,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:31,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:43:31,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697829842] [2021-05-02 23:43:31,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:43:31,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:43:31,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:43:31,199 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:43:49,203 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:43:50,107 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:43:50,451 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:43:50,895 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:43:51,295 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:43:51,832 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:43:52,467 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-05-02 23:43:53,589 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:43:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:54,079 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2021-05-02 23:43:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:43:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 90 [2021-05-02 23:43:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:54,085 INFO L225 Difference]: With dead ends: 129 [2021-05-02 23:43:54,085 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:43:54,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 21353.6ms TimeCoverageRelationStatistics Valid=639, Invalid=17183, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:43:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:43:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-05-02 23:43:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:43:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-05-02 23:43:54,115 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 90 [2021-05-02 23:43:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:54,115 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-05-02 23:43:54,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:43:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-05-02 23:43:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:43:54,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:54,123 INFO L523 BasicCegarLoop]: trace histogram [51, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:54,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:43:54,123 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1343614206, now seen corresponding path program 54 times [2021-05-02 23:43:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:54,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135242315] [2021-05-02 23:43:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:54,157 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_3076 v_main_~n0~0_116) InVars {main_~i0~0=v_main_~i0~0_3076, main_~n0~0=v_main_~n0~0_116} OutVars{main_~i0~0=v_main_~i0~0_3076, main_~n0~0=v_main_~n0~0_116} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,160 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:43:54,230 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,263 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:54,301 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:43:54,384 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:55,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:43:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:43:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:55,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:43:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:55,298 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:44:03,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:03,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135242315] [2021-05-02 23:44:03,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [135242315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:03,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:03,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:44:03,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520802227] [2021-05-02 23:44:03,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:44:03,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:44:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=4312, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:44:03,600 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:44:21,823 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:44:22,188 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-02 23:44:22,503 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:44:22,900 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:44:23,289 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-02 23:44:24,467 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:44:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:25,027 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2021-05-02 23:44:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:44:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 90 [2021-05-02 23:44:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:25,034 INFO L225 Difference]: With dead ends: 125 [2021-05-02 23:44:25,034 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 23:44:25,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 18879.9ms TimeCoverageRelationStatistics Valid=697, Invalid=16333, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:44:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 23:44:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-02 23:44:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:44:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2021-05-02 23:44:25,061 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 90 [2021-05-02 23:44:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:25,061 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2021-05-02 23:44:25,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:44:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2021-05-02 23:44:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:44:25,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:25,077 INFO L523 BasicCegarLoop]: trace histogram [53, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:25,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:44:25,077 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 111123459, now seen corresponding path program 53 times [2021-05-02 23:44:25,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:25,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732613735] [2021-05-02 23:44:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:25,087 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_3130 v_main_~n0~0_117) InVars {main_~i0~0=v_main_~i0~0_3130, main_~n0~0=v_main_~n0~0_117} OutVars{main_~i0~0=v_main_~i0~0_3130, main_~n0~0=v_main_~n0~0_117} AuxVars[] AssignedVars[] [2021-05-02 23:44:25,090 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:44:25,167 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:25,192 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:25,274 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:44:25,394 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:44:25,399 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:26,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:44:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:26,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:44:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 23:44:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:26,207 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:44:35,417 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732613735] [2021-05-02 23:44:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [732613735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:35,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:35,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:44:35,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967477382] [2021-05-02 23:44:35,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:44:35,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:44:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4443, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:44:35,419 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:44:52,734 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:44:53,473 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:44:53,735 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:44:54,242 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:44:54,729 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:44:55,960 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:44:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:56,670 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-05-02 23:44:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:44:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 91 [2021-05-02 23:44:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:56,675 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:44:56,675 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:44:56,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 19777.7ms TimeCoverageRelationStatistics Valid=751, Invalid=17609, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:44:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:44:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-05-02 23:44:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:44:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-05-02 23:44:56,694 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 91 [2021-05-02 23:44:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:56,694 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-05-02 23:44:56,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:44:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-05-02 23:44:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:44:56,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:56,694 INFO L523 BasicCegarLoop]: trace histogram [52, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:56,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:44:56,694 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1420368324, now seen corresponding path program 55 times [2021-05-02 23:44:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:56,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80578482] [2021-05-02 23:44:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:56,710 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_3186 v_main_~n0~0_118) InVars {main_~i0~0=v_main_~i0~0_3186, main_~n0~0=v_main_~n0~0_118} OutVars{main_~i0~0=v_main_~i0~0_3186, main_~n0~0=v_main_~n0~0_118} AuxVars[] AssignedVars[] [2021-05-02 23:44:56,713 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:44:56,750 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:56,766 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:56,816 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:44:56,890 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:44:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:44:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:44:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:57,623 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:45:05,469 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80578482] [2021-05-02 23:45:05,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [80578482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:05,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:05,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:45:05,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778766028] [2021-05-02 23:45:05,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:45:05,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:45:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4494, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:45:05,471 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:45:20,148 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:45:20,433 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:45:20,767 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:45:21,112 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:45:21,491 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-02 23:45:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:22,530 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-05-02 23:45:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:45:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 91 [2021-05-02 23:45:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:22,534 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:45:22,534 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:45:22,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 17007.7ms TimeCoverageRelationStatistics Valid=609, Invalid=16947, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:45:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:45:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-02 23:45:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:45:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-05-02 23:45:22,549 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2021-05-02 23:45:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:22,550 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-05-02 23:45:22,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:45:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-05-02 23:45:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:45:22,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:22,550 INFO L523 BasicCegarLoop]: trace histogram [54, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:22,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:45:22,550 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:22,551 INFO L82 PathProgramCache]: Analyzing trace with hash -104764031, now seen corresponding path program 54 times [2021-05-02 23:45:22,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:22,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970962932] [2021-05-02 23:45:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:22,558 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_3241 v_main_~n0~0_119) InVars {main_~i0~0=v_main_~i0~0_3241, main_~n0~0=v_main_~n0~0_119} OutVars{main_~i0~0=v_main_~i0~0_3241, main_~n0~0=v_main_~n0~0_119} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,560 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:45:22,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,605 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:22,631 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:45:22,689 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 23:45:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:45:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 23:45:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:30,249 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:30,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970962932] [2021-05-02 23:45:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [970962932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:45:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042815612] [2021-05-02 23:45:30,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:45:30,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:45:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4577, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:45:30,250 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:45:48,116 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:45:48,940 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:45:49,371 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:45:49,828 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:45:50,115 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:45:50,731 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:45:51,433 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-02 23:45:52,540 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:45:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:53,037 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-05-02 23:45:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:45:53,051 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 92 [2021-05-02 23:45:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:53,052 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:45:53,052 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:45:53,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 18648.0ms TimeCoverageRelationStatistics Valid=762, Invalid=18144, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:45:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:45:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2021-05-02 23:45:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.058139534883721) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:45:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-05-02 23:45:53,069 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 92 [2021-05-02 23:45:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:53,069 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-05-02 23:45:53,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:45:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-05-02 23:45:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:45:53,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:53,071 INFO L523 BasicCegarLoop]: trace histogram [53, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:53,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:45:53,072 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1204480834, now seen corresponding path program 56 times [2021-05-02 23:45:53,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:53,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106031254] [2021-05-02 23:45:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:53,082 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_3298 v_main_~n0~0_120) InVars {main_~i0~0=v_main_~i0~0_3298, main_~n0~0=v_main_~n0~0_120} OutVars{main_~i0~0=v_main_~i0~0_3298, main_~n0~0=v_main_~n0~0_120} AuxVars[] AssignedVars[] [2021-05-02 23:45:53,087 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size [2021-05-02 23:45:53,089 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:53,107 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:53,199 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.2 percent of original size 58 [2021-05-02 23:45:53,292 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-02 23:45:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:54,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 23:45:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:54,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:45:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:54,354 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-02 23:46:04,109 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:04,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106031254] [2021-05-02 23:46:04,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106031254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:04,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:04,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:46:04,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944180015] [2021-05-02 23:46:04,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:46:04,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:46:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4578, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:46:04,111 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)