/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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:15:33,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:15:33,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:15:33,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:15:33,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:15:33,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:15:33,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:15:33,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:15:33,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:15:33,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:15:33,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:15:33,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:15:33,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:15:33,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:15:33,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:15:33,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:15:33,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:15:33,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:15:33,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:15:33,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:15:33,738 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 23:15:33,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:15:33,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:15:33,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:15:33,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:15:33,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:15:33,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:15:33,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:15:33,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:15:33,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:15:33,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:15:33,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:15:33,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:15:33,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:15:33,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:15:33,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:15:33,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:15:33,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:15:33,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:15:33,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:33,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:15:33,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:15:33,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:15:33,755 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:15:33,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:15:34,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:15:34,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:15:34,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:15:34,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:15:34,049 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:15:34,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2021-05-02 23:15:34,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a358664b/8fb6f86f86d64f81ac732db04c10bb19/FLAG07784dcac [2021-05-02 23:15:34,510 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:15:34,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2021-05-02 23:15:34,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a358664b/8fb6f86f86d64f81ac732db04c10bb19/FLAG07784dcac [2021-05-02 23:15:34,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a358664b/8fb6f86f86d64f81ac732db04c10bb19 [2021-05-02 23:15:34,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:15:34,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:15:34,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:34,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:15:34,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:15:34,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:34" (1/1) ... [2021-05-02 23:15:34,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524ec54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:34, skipping insertion in model container [2021-05-02 23:15:34,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:34" (1/1) ... [2021-05-02 23:15:34,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:15:34,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:15:35,112 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2021-05-02 23:15:35,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:35,129 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:15:35,138 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2021-05-02 23:15:35,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:35,155 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:15:35,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35 WrapperNode [2021-05-02 23:15:35,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:35,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:15:35,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:15:35,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:15:35,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (1/1) ... [2021-05-02 23:15:35,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:15:35,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:15:35,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:15:35,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:15:35,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (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 23:15:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:15:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:15:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:15:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:15:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:15:35,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:15:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:15:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:15:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:15:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:15:35,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:15:35,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:15:35,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:15:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:15:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:15:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:15:35,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:15:35,612 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 23:15:35,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:35 BoogieIcfgContainer [2021-05-02 23:15:35,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:15:35,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:15:35,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:15:35,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:15:35,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:15:34" (1/3) ... [2021-05-02 23:15:35,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472e6943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:35, skipping insertion in model container [2021-05-02 23:15:35,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:35" (2/3) ... [2021-05-02 23:15:35,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472e6943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:35, skipping insertion in model container [2021-05-02 23:15:35,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:35" (3/3) ... [2021-05-02 23:15:35,619 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2021-05-02 23:15:35,627 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:15:35,630 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:15:35,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:15:35,667 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:15:35,667 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:15:35,667 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:15:35,667 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:15:35,667 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:15:35,668 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:15:35,668 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:15:35,668 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:15:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 23:15:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:15:35,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:35,688 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 23:15:35,688 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1611689087, now seen corresponding path program 1 times [2021-05-02 23:15:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:35,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003329668] [2021-05-02 23:15:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:35,748 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:35,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:35,950 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:35,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003329668] [2021-05-02 23:15:35,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2003329668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:35,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:35,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:15:35,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942358924] [2021-05-02 23:15:35,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:15:35,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:15:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:35,967 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 23:15:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:36,081 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-05-02 23:15:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:15:36,083 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 23:15:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:36,088 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:15:36,089 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:15:36,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:15:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 23:15:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 23:15:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 23:15:36,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2021-05-02 23:15:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:36,125 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 23:15:36,125 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 23:15:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 23:15:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:15:36,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:36,126 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 23:15:36,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:15:36,126 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash -717013641, now seen corresponding path program 1 times [2021-05-02 23:15:36,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:36,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379814686] [2021-05-02 23:15:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:36,139 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:36,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:36,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379814686] [2021-05-02 23:15:36,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [379814686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:36,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:36,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:15:36,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257817502] [2021-05-02 23:15:36,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:15:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:15:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:36,293 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 23:15:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:36,458 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-05-02 23:15:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:15:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 23:15:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:36,461 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:15:36,462 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:15:36,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:15:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:15:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-02 23:15:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 23:15:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 23:15:36,488 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2021-05-02 23:15:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:36,488 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 23:15:36,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 23:15:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 23:15:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:15:36,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:36,489 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:36,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:15:36,490 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -442514949, now seen corresponding path program 1 times [2021-05-02 23:15:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:36,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823177548] [2021-05-02 23:15:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:36,526 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:36,529 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:37,151 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-05-02 23:15:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:37,656 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 23:15:37,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:37,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823177548] [2021-05-02 23:15:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823177548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:37,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:37,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:15:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226845708] [2021-05-02 23:15:37,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:15:37,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:37,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:15:37,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:15:37,658 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:38,217 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-02 23:15:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:15:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:15:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:38,221 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:15:38,221 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:15:38,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 815.7ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:15:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:15:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2021-05-02 23:15:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 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 23:15:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 23:15:38,240 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 25 [2021-05-02 23:15:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:38,240 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 23:15:38,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 23:15:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:15:38,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:38,241 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 23:15:38,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:15:38,242 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:38,242 INFO L82 PathProgramCache]: Analyzing trace with hash 479826701, now seen corresponding path program 1 times [2021-05-02 23:15:38,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:38,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82268844] [2021-05-02 23:15:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:38,249 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:38,250 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:38,994 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 51 [2021-05-02 23:15:39,555 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-05-02 23:15:39,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:39,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:15:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:39,660 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:39,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82268844] [2021-05-02 23:15:39,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [82268844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:39,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:39,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:15:39,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115309899] [2021-05-02 23:15:39,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:15:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:15:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:15:39,662 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 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 23:15:40,521 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 70 [2021-05-02 23:15:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:40,664 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-05-02 23:15:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:15:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 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 41 [2021-05-02 23:15:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:40,666 INFO L225 Difference]: With dead ends: 87 [2021-05-02 23:15:40,666 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:15:40,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1452.2ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:15:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:15:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-02 23:15:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 63 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:15:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-05-02 23:15:40,684 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2021-05-02 23:15:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:40,684 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-05-02 23:15:40,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 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 23:15:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-05-02 23:15:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:15:40,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:40,686 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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 23:15:40,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:15:40,686 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash 56579942, now seen corresponding path program 2 times [2021-05-02 23:15:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:40,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314108565] [2021-05-02 23:15:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:40,692 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:40,693 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:40,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:40,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 23:15:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:40,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314108565] [2021-05-02 23:15:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314108565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:40,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:40,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:15:40,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216413988] [2021-05-02 23:15:40,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:15:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:15:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:15:40,826 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 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 23:15:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:41,261 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2021-05-02 23:15:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:15:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 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 44 [2021-05-02 23:15:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:41,264 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:15:41,265 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 23:15:41,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:15:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 23:15:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 83. [2021-05-02 23:15:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 74 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:15:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 23:15:41,282 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 44 [2021-05-02 23:15:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:41,282 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 23:15:41,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 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 23:15:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 23:15:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:15:41,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:41,284 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:41,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:15:41,284 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1936282649, now seen corresponding path program 3 times [2021-05-02 23:15:41,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:41,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082312167] [2021-05-02 23:15:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:41,293 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:41,294 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:41,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:41,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:15:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:41,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:15:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:41,465 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:41,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082312167] [2021-05-02 23:15:41,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082312167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:41,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:41,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:15:41,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588933031] [2021-05-02 23:15:41,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:15:41,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:15:41,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:15:41,466 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 23:15:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:41,682 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2021-05-02 23:15:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:15:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 49 [2021-05-02 23:15:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:41,684 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:15:41,684 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:15:41,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:15:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:15:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2021-05-02 23:15:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 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 23:15:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-05-02 23:15:41,692 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 49 [2021-05-02 23:15:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:41,693 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-05-02 23:15:41,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 23:15:41,693 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-05-02 23:15:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:15:41,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:41,693 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 23:15:41,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:15:41,694 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:41,694 INFO L82 PathProgramCache]: Analyzing trace with hash 22537489, now seen corresponding path program 4 times [2021-05-02 23:15:41,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:41,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072975720] [2021-05-02 23:15:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:41,699 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:41,700 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:42,792 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 48 [2021-05-02 23:15:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:43,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:15:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:43,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072975720] [2021-05-02 23:15:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072975720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:43,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:43,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:15:43,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770698424] [2021-05-02 23:15:43,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:15:43,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:15:43,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:15:43,215 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:44,663 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2021-05-02 23:15:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:15:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-05-02 23:15:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:44,664 INFO L225 Difference]: With dead ends: 111 [2021-05-02 23:15:44,664 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:15:44,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2022.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:15:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:15:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-05-02 23:15:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.095890410958904) internal successors, (80), 74 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:15:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 23:15:44,709 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 49 [2021-05-02 23:15:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:44,709 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 23:15:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:15:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 23:15:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:15:44,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:44,717 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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 23:15:44,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:15:44,727 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:44,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1139032170, now seen corresponding path program 5 times [2021-05-02 23:15:44,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:44,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033887354] [2021-05-02 23:15:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:44,745 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:44,746 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:44,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 23:15:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:44,936 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:44,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033887354] [2021-05-02 23:15:44,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2033887354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:44,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:44,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:15:44,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95114478] [2021-05-02 23:15:44,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:15:44,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:15:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:15:44,938 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 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 23:15:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:45,663 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2021-05-02 23:15:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:15:45,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 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 52 [2021-05-02 23:15:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:45,674 INFO L225 Difference]: With dead ends: 171 [2021-05-02 23:15:45,674 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 23:15:45,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:15:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 23:15:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-05-02 23:15:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 85 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:15:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-05-02 23:15:45,695 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 52 [2021-05-02 23:15:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:45,695 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-05-02 23:15:45,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 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 23:15:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-05-02 23:15:45,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:15:45,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:45,696 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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 23:15:45,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:15:45,696 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash 267696619, now seen corresponding path program 6 times [2021-05-02 23:15:45,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:45,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744579595] [2021-05-02 23:15:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:45,704 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:45,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:46,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:46,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:15:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:15:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:46,445 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:46,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744579595] [2021-05-02 23:15:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744579595] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:46,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:46,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:15:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500976598] [2021-05-02 23:15:46,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:15:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:15:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:15:46,447 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 23:15:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:47,111 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-05-02 23:15:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:15:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 57 [2021-05-02 23:15:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:47,123 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:15:47,123 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 23:15:47,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:15:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 23:15:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2021-05-02 23:15:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 93 states have (on average 1.086021505376344) internal successors, (101), 94 states have internal predecessors, (101), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:15:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-05-02 23:15:47,149 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 57 [2021-05-02 23:15:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:47,150 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-05-02 23:15:47,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 23:15:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-05-02 23:15:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:15:47,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:47,150 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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 23:15:47,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:15:47,151 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1027853257, now seen corresponding path program 7 times [2021-05-02 23:15:47,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:47,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765268801] [2021-05-02 23:15:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:47,156 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:47,157 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:48,446 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-05-02 23:15:48,950 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 55 [2021-05-02 23:15:49,328 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2021-05-02 23:15:49,589 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-05-02 23:15:49,987 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 68 [2021-05-02 23:15:50,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:15:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:50,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:50,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765268801] [2021-05-02 23:15:50,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [765268801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:50,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:50,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:15:50,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597172411] [2021-05-02 23:15:50,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:15:50,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:15:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:15:50,095 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 23:15:51,346 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2021-05-02 23:15:51,951 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2021-05-02 23:15:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:52,691 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2021-05-02 23:15:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:15:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 57 [2021-05-02 23:15:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:52,693 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:15:52,693 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 23:15:52,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 3846.4ms TimeCoverageRelationStatistics Valid=370, Invalid=2080, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:15:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 23:15:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2021-05-02 23:15:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 110 states have internal predecessors, (117), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:15:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-05-02 23:15:52,716 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 57 [2021-05-02 23:15:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:52,716 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-05-02 23:15:52,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 23:15:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-05-02 23:15:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:15:52,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:52,717 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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 23:15:52,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:15:52,717 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:52,717 INFO L82 PathProgramCache]: Analyzing trace with hash 319798818, now seen corresponding path program 8 times [2021-05-02 23:15:52,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:52,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611602428] [2021-05-02 23:15:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:52,722 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:52,723 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:52,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:15:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:52,980 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:52,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611602428] [2021-05-02 23:15:52,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [611602428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:52,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:52,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:15:52,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855179779] [2021-05-02 23:15:52,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:15:52,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:52,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:15:52,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:15:52,981 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 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 23:15:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:53,742 INFO L93 Difference]: Finished difference Result 225 states and 249 transitions. [2021-05-02 23:15:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:15:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 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 60 [2021-05-02 23:15:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:53,744 INFO L225 Difference]: With dead ends: 225 [2021-05-02 23:15:53,744 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 23:15:53,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:15:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 23:15:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 133. [2021-05-02 23:15:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 119 states have (on average 1.084033613445378) internal successors, (129), 121 states have internal predecessors, (129), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:15:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-05-02 23:15:53,774 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 60 [2021-05-02 23:15:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:53,775 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-05-02 23:15:53,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 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 23:15:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-05-02 23:15:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:15:53,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:53,776 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:53,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:15:53,777 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1329326907, now seen corresponding path program 9 times [2021-05-02 23:15:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736591977] [2021-05-02 23:15:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:53,786 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:53,788 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:53,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:53,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:15:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:15:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:53,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:15:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:53,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:53,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736591977] [2021-05-02 23:15:53,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [736591977] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:53,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:53,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:15:53,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116022980] [2021-05-02 23:15:53,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:15:53,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:53,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:15:53,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:15:53,983 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 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 23:15:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:54,336 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2021-05-02 23:15:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:15:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 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 65 [2021-05-02 23:15:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:54,338 INFO L225 Difference]: With dead ends: 220 [2021-05-02 23:15:54,338 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:15:54,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:15:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:15:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2021-05-02 23:15:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 107 states have (on average 1.074766355140187) internal successors, (115), 109 states have internal predecessors, (115), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:15:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2021-05-02 23:15:54,361 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 65 [2021-05-02 23:15:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:54,361 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2021-05-02 23:15:54,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 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 23:15:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2021-05-02 23:15:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:15:54,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:54,362 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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 23:15:54,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:15:54,362 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 888115021, now seen corresponding path program 10 times [2021-05-02 23:15:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:54,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880848052] [2021-05-02 23:15:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:54,367 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:54,368 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:55,818 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 50 [2021-05-02 23:15:55,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:55,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:15:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:55,925 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:55,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880848052] [2021-05-02 23:15:55,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [880848052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:55,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:55,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:15:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914210793] [2021-05-02 23:15:55,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:15:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:15:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:15:55,927 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 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 23:15:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:57,051 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2021-05-02 23:15:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:15:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 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 65 [2021-05-02 23:15:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:57,053 INFO L225 Difference]: With dead ends: 220 [2021-05-02 23:15:57,053 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 23:15:57,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1667.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:15:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 23:15:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 138. [2021-05-02 23:15:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 126 states have internal predecessors, (133), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:15:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-05-02 23:15:57,079 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 65 [2021-05-02 23:15:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:57,080 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-05-02 23:15:57,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 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 23:15:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-05-02 23:15:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:15:57,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:57,081 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 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 23:15:57,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:15:57,081 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1282676902, now seen corresponding path program 11 times [2021-05-02 23:15:57,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:57,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967040687] [2021-05-02 23:15:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:57,088 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:57,089 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-02 23:15:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:57,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:57,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967040687] [2021-05-02 23:15:57,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967040687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:57,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:57,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:15:57,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101410535] [2021-05-02 23:15:57,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:15:57,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:15:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:15:57,370 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 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 23:15:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:58,472 INFO L93 Difference]: Finished difference Result 266 states and 293 transitions. [2021-05-02 23:15:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:15:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 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 68 [2021-05-02 23:15:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:58,474 INFO L225 Difference]: With dead ends: 266 [2021-05-02 23:15:58,475 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 23:15:58,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:15:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 23:15:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 149. [2021-05-02 23:15:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 135 states have (on average 1.0740740740740742) internal successors, (145), 137 states have internal predecessors, (145), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:15:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2021-05-02 23:15:58,505 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 68 [2021-05-02 23:15:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:58,505 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2021-05-02 23:15:58,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 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 23:15:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2021-05-02 23:15:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:15:58,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:58,506 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:58,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:15:58,506 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1312525181, now seen corresponding path program 12 times [2021-05-02 23:15:58,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:58,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476960444] [2021-05-02 23:15:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:58,515 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:58,516 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,204 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2021-05-02 23:16:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:16:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:16:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,311 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476960444] [2021-05-02 23:16:00,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476960444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:00,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733181447] [2021-05-02 23:16:00,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:00,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:00,313 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 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 23:16:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:02,750 INFO L93 Difference]: Finished difference Result 221 states and 241 transitions. [2021-05-02 23:16:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 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 73 [2021-05-02 23:16:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:02,752 INFO L225 Difference]: With dead ends: 221 [2021-05-02 23:16:02,752 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:16:02,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3186.6ms TimeCoverageRelationStatistics Valid=306, Invalid=2244, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:16:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 193. [2021-05-02 23:16:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 173 states have (on average 1.0751445086705202) internal successors, (186), 176 states have internal predecessors, (186), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:16:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2021-05-02 23:16:02,795 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 73 [2021-05-02 23:16:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:02,795 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2021-05-02 23:16:02,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 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 23:16:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2021-05-02 23:16:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:16:02,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:02,796 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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 23:16:02,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:02,797 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:02,797 INFO L82 PathProgramCache]: Analyzing trace with hash -200935803, now seen corresponding path program 13 times [2021-05-02 23:16:02,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:02,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463487248] [2021-05-02 23:16:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:02,802 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:02,803 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,897 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 23:16:04,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:04,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463487248] [2021-05-02 23:16:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [463487248] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225776387] [2021-05-02 23:16:04,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:04,899 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 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 23:16:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:06,674 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2021-05-02 23:16:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 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 73 [2021-05-02 23:16:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:06,676 INFO L225 Difference]: With dead ends: 287 [2021-05-02 23:16:06,677 INFO L226 Difference]: Without dead ends: 285 [2021-05-02 23:16:06,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2266.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-02 23:16:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 197. [2021-05-02 23:16:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 176 states have (on average 1.0738636363636365) internal successors, (189), 179 states have internal predecessors, (189), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:16:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2021-05-02 23:16:06,724 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 73 [2021-05-02 23:16:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:06,724 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2021-05-02 23:16:06,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 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 23:16:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2021-05-02 23:16:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:16:06,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:06,725 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:06,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:06,725 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1952987391, now seen corresponding path program 14 times [2021-05-02 23:16:06,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:06,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976419588] [2021-05-02 23:16:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:06,730 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:06,731 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:16:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,870 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 23:16:08,870 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:08,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976419588] [2021-05-02 23:16:08,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976419588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:08,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:08,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:08,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898258518] [2021-05-02 23:16:08,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:08,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:08,872 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 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 23:16:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:11,521 INFO L93 Difference]: Finished difference Result 271 states and 294 transitions. [2021-05-02 23:16:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:11,522 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 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 81 [2021-05-02 23:16:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:11,523 INFO L225 Difference]: With dead ends: 271 [2021-05-02 23:16:11,523 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 23:16:11,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3299.6ms TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 23:16:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2021-05-02 23:16:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 182 states have (on average 1.0714285714285714) internal successors, (195), 185 states have internal predecessors, (195), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:16:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 222 transitions. [2021-05-02 23:16:11,574 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 222 transitions. Word has length 81 [2021-05-02 23:16:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:11,574 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 222 transitions. [2021-05-02 23:16:11,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 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 23:16:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 222 transitions. [2021-05-02 23:16:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:16:11,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:11,575 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:11,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:11,575 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:11,575 INFO L82 PathProgramCache]: Analyzing trace with hash 88433457, now seen corresponding path program 15 times [2021-05-02 23:16:11,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:11,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342492392] [2021-05-02 23:16:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:11,580 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:11,581 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:16:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:16:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:11,833 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342492392] [2021-05-02 23:16:11,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [342492392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:11,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244064712] [2021-05-02 23:16:11,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:11,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:11,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:11,836 INFO L87 Difference]: Start difference. First operand 205 states and 222 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:16:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,358 INFO L93 Difference]: Finished difference Result 286 states and 306 transitions. [2021-05-02 23:16:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 89 [2021-05-02 23:16:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,360 INFO L225 Difference]: With dead ends: 286 [2021-05-02 23:16:12,360 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 23:16:12,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 23:16:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2021-05-02 23:16:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 132 states have (on average 1.0606060606060606) internal successors, (140), 134 states have internal predecessors, (140), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:16:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 159 transitions. [2021-05-02 23:16:12,397 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 159 transitions. Word has length 89 [2021-05-02 23:16:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,397 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 159 transitions. [2021-05-02 23:16:12,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:16:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 159 transitions. [2021-05-02 23:16:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:16:12,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,398 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:12,398 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash 283880411, now seen corresponding path program 16 times [2021-05-02 23:16:12,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249770280] [2021-05-02 23:16:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,406 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,407 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,011 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 64 [2021-05-02 23:16:14,470 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 62 [2021-05-02 23:16:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:16:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,113 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249770280] [2021-05-02 23:16:15,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249770280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395226611] [2021-05-02 23:16:15,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:15,114 INFO L87 Difference]: Start difference. First operand 150 states and 159 transitions. Second operand has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:16:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,122 INFO L93 Difference]: Finished difference Result 190 states and 202 transitions. [2021-05-02 23:16:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 89 [2021-05-02 23:16:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,124 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:16:18,124 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 23:16:18,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4067.8ms TimeCoverageRelationStatistics Valid=323, Invalid=2539, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 23:16:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 162. [2021-05-02 23:16:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 141 states have (on average 1.0567375886524824) internal successors, (149), 143 states have internal predecessors, (149), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:16:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2021-05-02 23:16:18,165 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 89 [2021-05-02 23:16:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,165 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2021-05-02 23:16:18,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:16:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2021-05-02 23:16:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:16:18,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,166 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:18,167 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1546174009, now seen corresponding path program 17 times [2021-05-02 23:16:18,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934693400] [2021-05-02 23:16:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,177 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,178 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,399 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 64 [2021-05-02 23:16:20,056 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2021-05-02 23:16:20,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,174 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934693400] [2021-05-02 23:16:20,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934693400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:20,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918910063] [2021-05-02 23:16:20,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:20,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:20,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:20,175 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 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 23:16:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,357 INFO L93 Difference]: Finished difference Result 216 states and 233 transitions. [2021-05-02 23:16:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 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 23:16:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,359 INFO L225 Difference]: With dead ends: 216 [2021-05-02 23:16:22,359 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 23:16:22,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2575.7ms TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 23:16:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-05-02 23:16:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 110 states have (on average 1.0545454545454545) internal successors, (116), 111 states have internal predecessors, (116), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2021-05-02 23:16:22,395 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 89 [2021-05-02 23:16:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,395 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2021-05-02 23:16:22,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 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 23:16:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2021-05-02 23:16:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:16:22,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,396 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:22,397 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -933095755, now seen corresponding path program 18 times [2021-05-02 23:16:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423896198] [2021-05-02 23:16:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,404 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:16:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,661 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423896198] [2021-05-02 23:16:22,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [423896198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:22,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648208476] [2021-05-02 23:16:22,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:22,662 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:16:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,380 INFO L93 Difference]: Finished difference Result 236 states and 250 transitions. [2021-05-02 23:16:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:23,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 97 [2021-05-02 23:16:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,382 INFO L225 Difference]: With dead ends: 236 [2021-05-02 23:16:23,382 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:16:23,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:16:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2021-05-02 23:16:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2021-05-02 23:16:23,412 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 97 [2021-05-02 23:16:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,412 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2021-05-02 23:16:23,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:16:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2021-05-02 23:16:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:16:23,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,412 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:23,413 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash 55418349, now seen corresponding path program 19 times [2021-05-02 23:16:23,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335044824] [2021-05-02 23:16:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,419 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,420 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,118 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2021-05-02 23:16:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:16:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:25,250 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335044824] [2021-05-02 23:16:25,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [335044824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:25,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101404749] [2021-05-02 23:16:25,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:25,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:25,251 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:16:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:27,280 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-05-02 23:16:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:27,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 105 [2021-05-02 23:16:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:27,281 INFO L225 Difference]: With dead ends: 123 [2021-05-02 23:16:27,281 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:16:27,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2447.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:16:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2021-05-02 23:16:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:16:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-05-02 23:16:27,341 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 105 [2021-05-02 23:16:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,341 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-05-02 23:16:27,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:16:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-05-02 23:16:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:16:27,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,342 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:27,342 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -410921273, now seen corresponding path program 20 times [2021-05-02 23:16:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922140233] [2021-05-02 23:16:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,357 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,358 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:16:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:16:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:16:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:27,956 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:27,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922140233] [2021-05-02 23:16:27,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922140233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:27,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:27,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:27,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998980027] [2021-05-02 23:16:27,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:27,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:27,957 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:28,895 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2021-05-02 23:16:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 113 [2021-05-02 23:16:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:28,896 INFO L225 Difference]: With dead ends: 265 [2021-05-02 23:16:28,896 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 23:16:28,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 23:16:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2021-05-02 23:16:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:16:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-05-02 23:16:28,937 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 113 [2021-05-02 23:16:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:28,937 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-05-02 23:16:28,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-05-02 23:16:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 23:16:28,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:28,938 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:28,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:28,938 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash 188454859, now seen corresponding path program 21 times [2021-05-02 23:16:28,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:28,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310365473] [2021-05-02 23:16:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:28,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:28,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,021 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 54 [2021-05-02 23:16:32,166 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2021-05-02 23:16:32,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:16:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:16:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:16:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,343 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 23:16:32,343 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310365473] [2021-05-02 23:16:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [310365473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:32,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755260152] [2021-05-02 23:16:32,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:32,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:32,345 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:35,210 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-05-02 23:16:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,213 INFO L93 Difference]: Finished difference Result 237 states and 259 transitions. [2021-05-02 23:16:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:16:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 121 [2021-05-02 23:16:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,215 INFO L225 Difference]: With dead ends: 237 [2021-05-02 23:16:37,216 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 23:16:37,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 5866.0ms TimeCoverageRelationStatistics Valid=557, Invalid=5449, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:16:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 23:16:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 199. [2021-05-02 23:16:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 174 states have internal predecessors, (180), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:16:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 213 transitions. [2021-05-02 23:16:37,286 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 213 transitions. Word has length 121 [2021-05-02 23:16:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,287 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 213 transitions. [2021-05-02 23:16:37,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 213 transitions. [2021-05-02 23:16:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 23:16:37,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,287 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:37,288 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash 268976676, now seen corresponding path program 22 times [2021-05-02 23:16:37,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689594265] [2021-05-02 23:16:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,293 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,294 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-05-02 23:16:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-05-02 23:16:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-05-02 23:16:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-05-02 23:16:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-05-02 23:16:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-05-02 23:16:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:37,740 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689594265] [2021-05-02 23:16:37,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689594265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:37,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165255421] [2021-05-02 23:16:37,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:37,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:37,741 INFO L87 Difference]: Start difference. First operand 199 states and 213 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 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 23:16:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,646 INFO L93 Difference]: Finished difference Result 368 states and 404 transitions. [2021-05-02 23:16:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 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 124 [2021-05-02 23:16:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,648 INFO L225 Difference]: With dead ends: 368 [2021-05-02 23:16:39,648 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 23:16:39,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 23:16:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 210. [2021-05-02 23:16:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 184 states have (on average 1.0434782608695652) internal successors, (192), 185 states have internal predecessors, (192), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:16:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2021-05-02 23:16:39,730 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 124 [2021-05-02 23:16:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,730 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2021-05-02 23:16:39,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 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 23:16:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2021-05-02 23:16:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 23:16:39,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,731 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:39,731 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1964341373, now seen corresponding path program 23 times [2021-05-02 23:16:39,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931994758] [2021-05-02 23:16:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,737 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,739 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:16:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:16:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:16:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:16:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:42,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931994758] [2021-05-02 23:16:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [931994758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498086207] [2021-05-02 23:16:42,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:42,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:42,394 INFO L87 Difference]: Start difference. First operand 210 states and 225 transitions. Second operand has 38 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 36 states have internal predecessors, (98), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,653 INFO L93 Difference]: Finished difference Result 368 states and 404 transitions. [2021-05-02 23:16:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:16:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 36 states have internal predecessors, (98), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 129 [2021-05-02 23:16:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,656 INFO L225 Difference]: With dead ends: 368 [2021-05-02 23:16:45,656 INFO L226 Difference]: Without dead ends: 366 [2021-05-02 23:16:45,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 3442.1ms TimeCoverageRelationStatistics Valid=570, Invalid=4260, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:16:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-02 23:16:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 214. [2021-05-02 23:16:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 187 states have (on average 1.0427807486631016) internal successors, (195), 188 states have internal predecessors, (195), 17 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:16:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 228 transitions. [2021-05-02 23:16:45,747 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 228 transitions. Word has length 129 [2021-05-02 23:16:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,747 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 228 transitions. [2021-05-02 23:16:45,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 36 states have internal predecessors, (98), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:16:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 228 transitions. [2021-05-02 23:16:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:16:45,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,750 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:45,750 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1282347903, now seen corresponding path program 24 times [2021-05-02 23:16:45,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448252421] [2021-05-02 23:16:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,761 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,762 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 23:16:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:16:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:16:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:16:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:16:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:16:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:46,142 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448252421] [2021-05-02 23:16:46,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [448252421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:46,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909415349] [2021-05-02 23:16:46,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:46,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:46,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:46,143 INFO L87 Difference]: Start difference. First operand 214 states and 228 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:16:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,249 INFO L93 Difference]: Finished difference Result 314 states and 331 transitions. [2021-05-02 23:16:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 137 [2021-05-02 23:16:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,251 INFO L225 Difference]: With dead ends: 314 [2021-05-02 23:16:47,251 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:16:47,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:16:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2021-05-02 23:16:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:16:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-05-02 23:16:47,302 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 137 [2021-05-02 23:16:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,303 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-05-02 23:16:47,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:16:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-05-02 23:16:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:16:47,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,303 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:47,303 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1010747997, now seen corresponding path program 25 times [2021-05-02 23:16:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327434345] [2021-05-02 23:16:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,309 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,310 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,731 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-05-02 23:16:51,158 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 67 [2021-05-02 23:16:51,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 23:16:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:16:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:16:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:16:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:16:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:16:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:16:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:51,340 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327434345] [2021-05-02 23:16:51,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327434345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:51,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914122265] [2021-05-02 23:16:51,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:51,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:51,342 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:16:54,020 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-05-02 23:16:56,765 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2021-05-02 23:16:57,023 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 64 [2021-05-02 23:16:57,394 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 59 [2021-05-02 23:16:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:57,714 INFO L93 Difference]: Finished difference Result 230 states and 244 transitions. [2021-05-02 23:16:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:16:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 137 [2021-05-02 23:16:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:57,715 INFO L225 Difference]: With dead ends: 230 [2021-05-02 23:16:57,715 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 23:16:57,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 7520.1ms TimeCoverageRelationStatistics Valid=404, Invalid=5916, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:16:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 23:16:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-05-02 23:16:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:16:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2021-05-02 23:16:57,761 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 137 [2021-05-02 23:16:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:57,761 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2021-05-02 23:16:57,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:16:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2021-05-02 23:16:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:16:57,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:57,762 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:57,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:57,762 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash 25535158, now seen corresponding path program 26 times [2021-05-02 23:16:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:57,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008010211] [2021-05-02 23:16:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:57,767 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:57,768 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-05-02 23:16:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-05-02 23:16:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-05-02 23:16:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-05-02 23:16:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-05-02 23:16:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-05-02 23:16:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-05-02 23:16:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:58,237 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:58,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008010211] [2021-05-02 23:16:58,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008010211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:58,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:58,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:58,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408200425] [2021-05-02 23:16:58,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:58,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:58,238 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 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 23:16:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:59,915 INFO L93 Difference]: Finished difference Result 242 states and 252 transitions. [2021-05-02 23:16:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 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 140 [2021-05-02 23:16:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:59,916 INFO L225 Difference]: With dead ends: 242 [2021-05-02 23:16:59,916 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:16:59,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:16:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2021-05-02 23:16:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:16:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-05-02 23:16:59,965 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 140 [2021-05-02 23:16:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:59,965 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-05-02 23:16:59,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 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 23:16:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-05-02 23:16:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:16:59,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:59,966 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:59,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:59,966 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:59,967 INFO L82 PathProgramCache]: Analyzing trace with hash 573012193, now seen corresponding path program 27 times [2021-05-02 23:16:59,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:59,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174613491] [2021-05-02 23:16:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:59,972 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:59,973 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,630 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 48 [2021-05-02 23:17:02,035 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2021-05-02 23:17:03,148 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2021-05-02 23:17:03,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:17:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:17:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:17:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:17:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:17:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:17:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:17:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:03,352 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:03,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174613491] [2021-05-02 23:17:03,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [174613491] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:03,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:03,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:17:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138933307] [2021-05-02 23:17:03,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:17:03,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:17:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:17:03,353 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:07,786 INFO L93 Difference]: Finished difference Result 268 states and 289 transitions. [2021-05-02 23:17:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:17:07,787 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 145 [2021-05-02 23:17:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:07,788 INFO L225 Difference]: With dead ends: 268 [2021-05-02 23:17:07,788 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 23:17:07,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 4875.6ms TimeCoverageRelationStatistics Valid=373, Invalid=3659, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 23:17:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2021-05-02 23:17:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 205 states have (on average 1.0341463414634147) internal successors, (212), 206 states have internal predecessors, (212), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 247 transitions. [2021-05-02 23:17:07,883 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 247 transitions. Word has length 145 [2021-05-02 23:17:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:07,883 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 247 transitions. [2021-05-02 23:17:07,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 247 transitions. [2021-05-02 23:17:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:17:07,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:07,885 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:07,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:17:07,885 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1964971974, now seen corresponding path program 28 times [2021-05-02 23:17:07,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:07,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84677069] [2021-05-02 23:17:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:07,891 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:07,893 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-05-02 23:17:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-05-02 23:17:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-05-02 23:17:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-05-02 23:17:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-05-02 23:17:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-05-02 23:17:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-05-02 23:17:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:08,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:08,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84677069] [2021-05-02 23:17:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [84677069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:08,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:08,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:17:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463583095] [2021-05-02 23:17:08,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:17:08,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:17:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:17:08,599 INFO L87 Difference]: Start difference. First operand 233 states and 247 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 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 23:17:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,648 INFO L93 Difference]: Finished difference Result 430 states and 469 transitions. [2021-05-02 23:17:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:17:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 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 148 [2021-05-02 23:17:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,650 INFO L225 Difference]: With dead ends: 430 [2021-05-02 23:17:11,650 INFO L226 Difference]: Without dead ends: 312 [2021-05-02 23:17:11,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1068.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:17:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-02 23:17:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 244. [2021-05-02 23:17:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 216 states have (on average 1.037037037037037) internal successors, (224), 217 states have internal predecessors, (224), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 259 transitions. [2021-05-02 23:17:11,751 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 259 transitions. Word has length 148 [2021-05-02 23:17:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,751 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 259 transitions. [2021-05-02 23:17:11,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 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 23:17:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 259 transitions. [2021-05-02 23:17:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:17:11,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,752 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:17:11,752 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1256489541, now seen corresponding path program 29 times [2021-05-02 23:17:11,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458039334] [2021-05-02 23:17:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,757 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:11,759 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,584 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 54 [2021-05-02 23:17:15,991 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 52 [2021-05-02 23:17:16,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-05-02 23:17:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:17:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:17:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:17:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:17:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:17:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:17:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:17:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:16,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458039334] [2021-05-02 23:17:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458039334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:16,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:17:16,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116909321] [2021-05-02 23:17:16,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:17:16,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:16,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:17:16,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:17:16,309 INFO L87 Difference]: Start difference. First operand 244 states and 259 transitions. Second operand has 48 states, 46 states have (on average 2.5) internal successors, (115), 47 states have internal predecessors, (115), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:23,072 INFO L93 Difference]: Finished difference Result 274 states and 290 transitions. [2021-05-02 23:17:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:17:23,073 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.5) internal successors, (115), 47 states have internal predecessors, (115), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 153 [2021-05-02 23:17:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:23,075 INFO L225 Difference]: With dead ends: 274 [2021-05-02 23:17:23,075 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:17:23,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 7451.8ms TimeCoverageRelationStatistics Valid=494, Invalid=6988, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:17:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:17:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-02 23:17:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-05-02 23:17:23,128 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 153 [2021-05-02 23:17:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:23,128 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-05-02 23:17:23,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 46 states have (on average 2.5) internal successors, (115), 47 states have internal predecessors, (115), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-05-02 23:17:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:17:23,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:23,129 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:23,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:17:23,129 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:23,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1042616039, now seen corresponding path program 30 times [2021-05-02 23:17:23,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:23,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637763677] [2021-05-02 23:17:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:23,137 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:23,138 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,196 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2021-05-02 23:17:24,465 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2021-05-02 23:17:25,529 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-05-02 23:17:27,002 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 55 [2021-05-02 23:17:27,234 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 60 [2021-05-02 23:17:27,561 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2021-05-02 23:17:27,952 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-05-02 23:17:28,480 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-05-02 23:17:28,678 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-05-02 23:17:29,165 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 68 [2021-05-02 23:17:29,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:17:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:17:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:17:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:17:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:17:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:17:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:17:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:29,442 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:29,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637763677] [2021-05-02 23:17:29,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637763677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:29,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:29,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:17:29,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756915959] [2021-05-02 23:17:29,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:17:29,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:29,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:17:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:17:29,443 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 44 states, 43 states have (on average 2.7209302325581395) internal successors, (117), 42 states have internal predecessors, (117), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:33,223 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-05-02 23:17:33,459 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-05-02 23:17:33,684 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-05-02 23:17:33,905 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-05-02 23:17:34,303 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-05-02 23:17:34,574 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2021-05-02 23:17:34,788 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-02 23:17:35,070 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-05-02 23:17:35,284 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-05-02 23:17:35,599 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-05-02 23:17:35,980 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-05-02 23:17:37,028 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-05-02 23:17:37,410 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-05-02 23:17:37,769 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-05-02 23:17:38,197 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-05-02 23:17:38,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-05-02 23:17:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:39,169 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2021-05-02 23:17:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.7209302325581395) internal successors, (117), 42 states have internal predecessors, (117), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 153 [2021-05-02 23:17:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:39,172 INFO L225 Difference]: With dead ends: 278 [2021-05-02 23:17:39,172 INFO L226 Difference]: Without dead ends: 276 [2021-05-02 23:17:39,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 11270.4ms TimeCoverageRelationStatistics Valid=730, Invalid=7102, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:17:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-02 23:17:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 246. [2021-05-02 23:17:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 218 states have (on average 1.0321100917431192) internal successors, (225), 219 states have internal predecessors, (225), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 260 transitions. [2021-05-02 23:17:39,288 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 260 transitions. Word has length 153 [2021-05-02 23:17:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:39,289 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 260 transitions. [2021-05-02 23:17:39,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 2.7209302325581395) internal successors, (117), 42 states have internal predecessors, (117), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 260 transitions. [2021-05-02 23:17:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 23:17:39,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:39,290 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:39,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:17:39,290 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1719666830, now seen corresponding path program 31 times [2021-05-02 23:17:39,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:39,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125044779] [2021-05-02 23:17:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:39,297 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:39,298 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-05-02 23:17:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-05-02 23:17:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-05-02 23:17:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-05-02 23:17:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-05-02 23:17:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-05-02 23:17:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-05-02 23:17:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,148 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 23:17:40,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:40,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125044779] [2021-05-02 23:17:40,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125044779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:40,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:40,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:17:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065227308] [2021-05-02 23:17:40,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:17:40,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:17:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:17:40,149 INFO L87 Difference]: Start difference. First operand 246 states and 260 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 2 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 23:17:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:45,832 INFO L93 Difference]: Finished difference Result 466 states and 508 transitions. [2021-05-02 23:17:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:17:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 2 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 156 [2021-05-02 23:17:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:45,834 INFO L225 Difference]: With dead ends: 466 [2021-05-02 23:17:45,834 INFO L226 Difference]: Without dead ends: 346 [2021-05-02 23:17:45,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1736.6ms TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:17:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-02 23:17:45,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 257. [2021-05-02 23:17:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 229 states have (on average 1.034934497816594) internal successors, (237), 230 states have internal predecessors, (237), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 272 transitions. [2021-05-02 23:17:45,951 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 272 transitions. Word has length 156 [2021-05-02 23:17:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:45,951 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 272 transitions. [2021-05-02 23:17:45,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 2 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 23:17:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 272 transitions. [2021-05-02 23:17:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:17:45,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:45,952 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:45,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:17:45,952 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1959738867, now seen corresponding path program 32 times [2021-05-02 23:17:45,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:45,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578167588] [2021-05-02 23:17:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:45,959 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:45,960 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,991 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2021-05-02 23:17:48,213 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 53 [2021-05-02 23:17:48,467 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-05-02 23:17:50,031 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2021-05-02 23:17:50,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:17:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:17:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:17:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:17:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:17:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:17:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:17:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:17:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:50,315 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:50,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578167588] [2021-05-02 23:17:50,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [578167588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:50,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:50,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:17:50,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126712119] [2021-05-02 23:17:50,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:17:50,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:50,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:17:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:17:50,316 INFO L87 Difference]: Start difference. First operand 257 states and 272 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:51,821 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:17:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:56,431 INFO L93 Difference]: Finished difference Result 308 states and 327 transitions. [2021-05-02 23:17:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:17:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 161 [2021-05-02 23:17:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:56,434 INFO L225 Difference]: With dead ends: 308 [2021-05-02 23:17:56,434 INFO L226 Difference]: Without dead ends: 306 [2021-05-02 23:17:56,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 6277.1ms TimeCoverageRelationStatistics Valid=362, Invalid=4060, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-02 23:17:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 265. [2021-05-02 23:17:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 236 states have internal predecessors, (243), 19 states have call successors, (19), 12 states have call predecessors, (19), 10 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:17:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 280 transitions. [2021-05-02 23:17:56,571 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 280 transitions. Word has length 161 [2021-05-02 23:17:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:56,571 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 280 transitions. [2021-05-02 23:17:56,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 280 transitions. [2021-05-02 23:17:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:17:56,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:56,572 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:56,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:17:56,572 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash -333795043, now seen corresponding path program 33 times [2021-05-02 23:17:56,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:56,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001529193] [2021-05-02 23:17:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:56,578 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:56,579 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:58,602 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 43 [2021-05-02 23:17:58,879 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 38 [2021-05-02 23:17:59,197 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-05-02 23:17:59,436 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-02 23:18:00,508 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-05-02 23:18:00,761 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-05-02 23:18:01,105 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2021-05-02 23:18:01,481 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-05-02 23:18:02,538 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 52 [2021-05-02 23:18:02,882 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 63 [2021-05-02 23:18:03,109 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-05-02 23:18:03,458 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-05-02 23:18:03,689 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-05-02 23:18:04,063 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2021-05-02 23:18:04,797 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-05-02 23:18:05,028 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-05-02 23:18:05,254 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-05-02 23:18:05,510 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-05-02 23:18:05,755 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-05-02 23:18:06,026 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-05-02 23:18:06,298 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-05-02 23:18:06,734 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 66 [2021-05-02 23:18:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:18:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:18:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:18:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:18:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:18:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:18:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:18:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:07,297 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001529193] [2021-05-02 23:18:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2001529193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:07,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:18:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111474358] [2021-05-02 23:18:07,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:18:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:18:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2518, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:18:07,298 INFO L87 Difference]: Start difference. First operand 265 states and 280 transitions. Second operand has 53 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 52 states have internal predecessors, (128), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:18:09,121 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2021-05-02 23:18:09,446 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2021-05-02 23:18:09,746 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-05-02 23:18:10,396 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-02 23:18:10,633 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-02 23:18:12,017 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 36 [2021-05-02 23:18:12,400 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2021-05-02 23:18:12,746 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-05-02 23:18:13,096 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-05-02 23:18:14,291 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-05-02 23:18:14,590 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-05-02 23:18:14,935 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-05-02 23:18:15,291 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-05-02 23:18:15,671 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-05-02 23:18:16,287 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 56 [2021-05-02 23:18:16,507 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-05-02 23:18:16,920 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2021-05-02 23:18:17,436 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 64 [2021-05-02 23:18:17,668 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-02 23:18:18,018 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-05-02 23:18:18,497 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 59 [2021-05-02 23:18:18,730 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-02 23:18:19,036 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-05-02 23:18:19,488 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-05-02 23:18:19,779 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-05-02 23:18:20,275 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-05-02 23:18:20,753 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-05-02 23:18:21,037 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-05-02 23:18:21,609 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-05-02 23:18:21,900 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-05-02 23:18:22,412 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-05-02 23:18:22,914 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-05-02 23:18:23,369 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2021-05-02 23:18:23,592 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-05-02 23:18:23,873 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-05-02 23:18:24,297 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2021-05-02 23:18:24,588 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-05-02 23:18:24,966 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2021-05-02 23:18:25,287 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-05-02 23:18:25,714 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-05-02 23:18:25,959 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2021-05-02 23:18:26,286 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-05-02 23:18:26,534 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-05-02 23:18:26,894 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-05-02 23:18:27,156 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-05-02 23:18:27,498 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-05-02 23:18:27,771 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-05-02 23:18:28,085 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-05-02 23:18:28,452 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2021-05-02 23:18:28,701 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-05-02 23:18:28,989 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2021-05-02 23:18:29,315 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2021-05-02 23:18:29,547 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-05-02 23:18:29,820 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-05-02 23:18:30,131 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-05-02 23:18:30,450 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2021-05-02 23:18:30,779 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-05-02 23:18:31,670 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-05-02 23:18:32,317 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-05-02 23:18:32,837 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-05-02 23:18:33,174 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-05-02 23:18:33,556 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-05-02 23:18:33,787 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-02 23:18:34,240 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-05-02 23:18:34,569 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-05-02 23:18:34,833 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-02 23:18:35,401 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-05-02 23:18:35,687 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-05-02 23:18:36,002 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-05-02 23:18:36,389 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-05-02 23:18:36,647 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-02 23:18:36,997 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-05-02 23:18:37,414 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-05-02 23:18:37,679 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-05-02 23:18:38,023 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-05-02 23:18:38,443 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-05-02 23:18:38,739 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-05-02 23:18:39,363 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-05-02 23:18:39,773 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-05-02 23:18:40,159 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-05-02 23:18:40,637 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-05-02 23:18:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:40,904 INFO L93 Difference]: Finished difference Result 458 states and 501 transitions. [2021-05-02 23:18:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:18:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 52 states have internal predecessors, (128), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 161 [2021-05-02 23:18:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:40,907 INFO L225 Difference]: With dead ends: 458 [2021-05-02 23:18:40,907 INFO L226 Difference]: Without dead ends: 456 [2021-05-02 23:18:40,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 19 SyntacticMatches, 19 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6819 ImplicationChecksByTransitivity, 32933.1ms TimeCoverageRelationStatistics Valid=2085, Invalid=21785, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 23:18:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-02 23:18:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 269. [2021-05-02 23:18:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 238 states have (on average 1.0336134453781514) internal successors, (246), 239 states have internal predecessors, (246), 20 states have call successors, (20), 12 states have call predecessors, (20), 10 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:18:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 285 transitions. [2021-05-02 23:18:41,043 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 285 transitions. Word has length 161 [2021-05-02 23:18:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:41,044 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 285 transitions. [2021-05-02 23:18:41,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 52 states have internal predecessors, (128), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:18:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 285 transitions. [2021-05-02 23:18:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:18:41,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:41,045 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:41,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:18:41,045 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:41,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2030169907, now seen corresponding path program 34 times [2021-05-02 23:18:41,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:41,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932797734] [2021-05-02 23:18:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:41,052 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:41,053 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:44,047 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-05-02 23:18:45,355 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 43 [2021-05-02 23:18:45,669 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2021-05-02 23:18:46,043 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-02 23:18:46,277 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-02 23:18:46,479 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:18:46,684 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:18:46,894 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-05-02 23:18:47,110 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:18:47,332 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:18:47,565 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:18:47,799 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-05-02 23:18:48,241 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 53 [2021-05-02 23:18:48,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 23:18:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:18:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:18:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:18:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:18:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:18:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:18:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:18:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:18:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:48,661 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932797734] [2021-05-02 23:18:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [932797734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:48,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:48,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:18:48,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561131834] [2021-05-02 23:18:48,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:18:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:18:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:18:48,662 INFO L87 Difference]: Start difference. First operand 269 states and 285 transitions. Second operand has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:18:50,348 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-05-02 23:18:53,655 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-05-02 23:18:54,097 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-02 23:18:54,547 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-02 23:18:55,009 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-02 23:18:55,202 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-02 23:18:55,624 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-05-02 23:18:55,854 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-02 23:18:56,281 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-05-02 23:18:56,509 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:18:56,939 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-02 23:18:57,181 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:18:57,622 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-02 23:18:57,856 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-05-02 23:18:58,289 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-05-02 23:18:58,529 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:18:58,899 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-02 23:18:59,125 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:18:59,514 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-05-02 23:18:59,875 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:00,419 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:01,260 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-02 23:19:01,705 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-05-02 23:19:02,158 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-05-02 23:19:02,599 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-05-02 23:19:03,039 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-05-02 23:19:03,493 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-05-02 23:19:03,965 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-05-02 23:19:04,440 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-05-02 23:19:04,995 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-05-02 23:19:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:08,016 INFO L93 Difference]: Finished difference Result 320 states and 339 transitions. [2021-05-02 23:19:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:19:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 169 [2021-05-02 23:19:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:08,021 INFO L225 Difference]: With dead ends: 320 [2021-05-02 23:19:08,021 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:19:08,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 30 SyntacticMatches, 19 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 17580.8ms TimeCoverageRelationStatistics Valid=679, Invalid=8827, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:19:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2021-05-02 23:19:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:19:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2021-05-02 23:19:08,115 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 169 [2021-05-02 23:19:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:08,115 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2021-05-02 23:19:08,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:19:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2021-05-02 23:19:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:19:08,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:08,116 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:08,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:19:08,116 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:08,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1805600265, now seen corresponding path program 35 times [2021-05-02 23:19:08,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:08,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889040995] [2021-05-02 23:19:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:08,124 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:08,125 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:09,334 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-02 23:19:09,650 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-05-02 23:19:10,019 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-05-02 23:19:10,230 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2021-05-02 23:19:11,079 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2021-05-02 23:19:11,468 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 60 [2021-05-02 23:19:11,758 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-05-02 23:19:12,118 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 56 [2021-05-02 23:19:12,362 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-05-02 23:19:12,558 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-05-02 23:19:12,760 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-02 23:19:12,976 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-02 23:19:13,194 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:19:13,425 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:19:13,657 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-05-02 23:19:13,894 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:19:14,146 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-02 23:19:14,409 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-05-02 23:19:14,948 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 54 [2021-05-02 23:19:15,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:19:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:19:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:19:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:19:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:19:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:19:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:19:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:19:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:19:15,371 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:15,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889040995] [2021-05-02 23:19:15,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889040995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:15,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:15,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:19:15,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677700762] [2021-05-02 23:19:15,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:19:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:19:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:19:15,372 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand has 36 states, 35 states have (on average 2.8) internal successors, (98), 34 states have internal predecessors, (98), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:19:18,743 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-05-02 23:19:19,100 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-05-02 23:19:19,477 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-02 23:19:19,838 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-02 23:19:20,198 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-02 23:19:20,557 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-02 23:19:20,889 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-02 23:19:21,295 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-02 23:19:21,668 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-05-02 23:19:22,863 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-05-02 23:19:23,232 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-02 23:19:23,624 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-02 23:19:24,017 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-05-02 23:19:24,397 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-02 23:19:24,806 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-02 23:19:25,226 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-05-02 23:19:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:26,754 INFO L93 Difference]: Finished difference Result 195 states and 201 transitions. [2021-05-02 23:19:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:19:26,757 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8) internal successors, (98), 34 states have internal predecessors, (98), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 169 [2021-05-02 23:19:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:26,758 INFO L225 Difference]: With dead ends: 195 [2021-05-02 23:19:26,758 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 23:19:26,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 10304.3ms TimeCoverageRelationStatistics Valid=253, Invalid=2939, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:19:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 23:19:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2021-05-02 23:19:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:19:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 187 transitions. [2021-05-02 23:19:26,837 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 187 transitions. Word has length 169 [2021-05-02 23:19:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:26,837 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 187 transitions. [2021-05-02 23:19:26,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.8) internal successors, (98), 34 states have internal predecessors, (98), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:19:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 187 transitions. [2021-05-02 23:19:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:19:26,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:26,838 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:26,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:19:26,838 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1480744363, now seen corresponding path program 36 times [2021-05-02 23:19:26,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:26,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452662278] [2021-05-02 23:19:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:26,848 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:26,849 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:28,352 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-02 23:19:28,588 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-05-02 23:19:29,704 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-05-02 23:19:30,204 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 23:19:30,385 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-02 23:19:30,580 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-02 23:19:30,769 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-02 23:19:30,962 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-02 23:19:31,162 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-02 23:19:31,368 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-02 23:19:31,584 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-02 23:19:32,410 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 50 [2021-05-02 23:19:32,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:19:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:19:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:19:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:19:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:19:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:19:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:19:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:19:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:19:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:19:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:19:32,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452662278] [2021-05-02 23:19:32,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [452662278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:32,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:32,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:19:32,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087431505] [2021-05-02 23:19:32,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:19:32,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:19:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:19:32,952 INFO L87 Difference]: Start difference. First operand 182 states and 187 transitions. Second operand has 32 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:19:36,701 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-02 23:19:37,186 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-02 23:19:37,651 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:38,052 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:38,456 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-05-02 23:19:38,875 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:39,269 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:39,645 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:40,045 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:40,459 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:19:40,773 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-05-02 23:19:41,973 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:19:42,388 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:19:42,793 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:19:43,622 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:19:44,058 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:19:44,939 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-02 23:19:45,373 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-02 23:19:45,956 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-05-02 23:19:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:46,945 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2021-05-02 23:19:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:19:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 185 [2021-05-02 23:19:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:46,951 INFO L225 Difference]: With dead ends: 199 [2021-05-02 23:19:46,951 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 23:19:46,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 19 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 10616.3ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:19:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 23:19:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2021-05-02 23:19:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:19:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 195 transitions. [2021-05-02 23:19:47,040 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 195 transitions. Word has length 185 [2021-05-02 23:19:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:47,040 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 195 transitions. [2021-05-02 23:19:47,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:19:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 195 transitions. [2021-05-02 23:19:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 23:19:47,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:47,053 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:47,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:19:47,053 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 571603077, now seen corresponding path program 37 times [2021-05-02 23:19:47,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:47,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138539262] [2021-05-02 23:19:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:47,071 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:47,072 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 23:19:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:19:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:19:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:19:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:19:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:19:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:19:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:19:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:19:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:19:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:19:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:19:48,865 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138539262] [2021-05-02 23:19:48,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138539262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:48,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:48,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:19:48,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163413427] [2021-05-02 23:19:48,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:19:48,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:48,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:19:48,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:19:48,866 INFO L87 Difference]: Start difference. First operand 190 states and 195 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:19:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:57,157 INFO L93 Difference]: Finished difference Result 432 states and 458 transitions. [2021-05-02 23:19:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:19:57,162 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 193 [2021-05-02 23:19:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:57,163 INFO L225 Difference]: With dead ends: 432 [2021-05-02 23:19:57,163 INFO L226 Difference]: Without dead ends: 209 [2021-05-02 23:19:57,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2178.1ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:19:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-02 23:19:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2021-05-02 23:19:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:19:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2021-05-02 23:19:57,268 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 193 [2021-05-02 23:19:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:57,268 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2021-05-02 23:19:57,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:19:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2021-05-02 23:19:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-05-02 23:19:57,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:57,269 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:57,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:19:57,269 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2130342205, now seen corresponding path program 38 times [2021-05-02 23:19:57,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:57,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620198802] [2021-05-02 23:19:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:57,278 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:57,279 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:59,354 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-02 23:19:59,749 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2021-05-02 23:19:59,922 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-02 23:20:00,116 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 23:20:00,329 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-02 23:20:00,547 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-02 23:20:00,774 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-02 23:20:01,004 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-02 23:20:01,254 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-02 23:20:01,521 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-02 23:20:01,799 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-02 23:20:02,125 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-02 23:20:02,518 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-02 23:20:02,855 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-02 23:20:03,454 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-05-02 23:20:03,832 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-05-02 23:20:05,897 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 43 [2021-05-02 23:20:06,474 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2021-05-02 23:20:06,779 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-05-02 23:20:07,165 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-02 23:20:07,591 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 23:20:08,010 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 23:20:08,449 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 23:20:08,954 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 23:20:09,435 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-05-02 23:20:09,901 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 23:20:10,353 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 23:20:10,804 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-05-02 23:20:11,288 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 23:20:11,810 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-05-02 23:20:12,506 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2021-05-02 23:20:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 23:20:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:20:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:20:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:20:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:20:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:20:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:20:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:20:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:20:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:20:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:20:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:20:13,275 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620198802] [2021-05-02 23:20:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [620198802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:13,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:13,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:20:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927430081] [2021-05-02 23:20:13,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:20:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:20:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2300, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:20:13,276 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand has 50 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:20:14,119 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-05-02 23:20:14,735 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:15,234 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:15,777 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-05-02 23:20:16,295 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:16,804 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:17,315 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:17,814 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-05-02 23:20:18,360 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:18,896 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-02 23:20:19,390 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:20:19,852 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-02 23:20:20,603 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-05-02 23:20:21,435 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 23:20:21,982 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-05-02 23:20:22,408 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 23:20:22,956 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-02 23:20:23,358 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 23:20:23,893 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-02 23:20:24,277 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-02 23:20:24,820 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-05-02 23:20:25,263 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 23:20:25,833 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-05-02 23:20:26,243 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 23:20:26,823 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-05-02 23:20:27,244 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-02 23:20:27,886 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-05-02 23:20:28,321 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 23:20:28,851 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-02 23:20:29,243 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 23:20:29,832 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-02 23:20:30,646 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-02 23:20:31,439 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-02 23:20:32,595 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-05-02 23:20:33,554 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2021-05-02 23:20:34,475 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-05-02 23:20:35,451 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-05-02 23:20:35,860 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-02 23:20:36,831 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2021-05-02 23:20:37,410 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2021-05-02 23:20:38,381 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2021-05-02 23:20:38,943 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:39,907 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2021-05-02 23:20:40,398 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:41,220 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-05-02 23:20:41,751 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2021-05-02 23:20:42,676 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-05-02 23:20:43,209 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:44,143 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-05-02 23:20:44,687 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:45,602 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-05-02 23:20:46,142 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:46,969 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-05-02 23:20:47,531 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2021-05-02 23:20:48,397 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-05-02 23:20:49,257 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:49,710 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-02 23:20:50,453 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:20:50,982 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-05-02 23:20:51,615 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-05-02 23:20:52,470 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-05-02 23:20:53,221 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-02 23:20:53,913 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-05-02 23:20:54,637 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-02 23:20:55,302 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-05-02 23:20:56,003 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-02 23:20:56,663 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-05-02 23:20:57,333 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-05-02 23:20:58,032 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-05-02 23:20:58,820 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-02 23:20:59,525 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2021-05-02 23:21:00,237 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-05-02 23:21:00,938 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 48 [2021-05-02 23:21:01,628 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-05-02 23:21:02,328 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2021-05-02 23:21:02,794 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-05-02 23:21:03,245 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2021-05-02 23:21:03,974 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-05-02 23:21:04,703 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2021-05-02 23:21:05,409 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-02 23:21:06,115 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-05-02 23:21:06,818 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-05-02 23:21:07,459 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2021-05-02 23:21:08,188 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-02 23:21:08,929 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-05-02 23:21:10,451 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-05-02 23:21:10,877 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-05-02 23:21:11,277 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-05-02 23:21:11,733 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-05-02 23:21:12,188 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-02 23:21:12,678 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-05-02 23:21:13,146 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-05-02 23:21:13,626 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-05-02 23:21:14,072 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-02 23:21:14,603 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2021-05-02 23:21:15,043 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-05-02 23:21:15,525 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2021-05-02 23:21:16,012 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-02 23:21:16,507 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-05-02 23:21:16,970 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-05-02 23:21:17,445 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2021-05-02 23:21:17,883 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-02 23:21:18,358 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-05-02 23:21:18,978 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-05-02 23:21:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:19,563 INFO L93 Difference]: Finished difference Result 341 states and 364 transitions. [2021-05-02 23:21:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:21:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 201 [2021-05-02 23:21:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:19,571 INFO L225 Difference]: With dead ends: 341 [2021-05-02 23:21:19,571 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 23:21:19,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 36 SyntacticMatches, 22 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7297 ImplicationChecksByTransitivity, 60396.0ms TimeCoverageRelationStatistics Valid=1238, Invalid=24202, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 23:21:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 23:21:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2021-05-02 23:21:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:21:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 219 transitions. [2021-05-02 23:21:19,673 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 219 transitions. Word has length 201 [2021-05-02 23:21:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:19,674 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 219 transitions. [2021-05-02 23:21:19,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:21:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 219 transitions. [2021-05-02 23:21:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-05-02 23:21:19,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:19,675 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:19,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:21:19,675 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash -773376101, now seen corresponding path program 39 times [2021-05-02 23:21:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:19,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416652242] [2021-05-02 23:21:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:19,687 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:19,688 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:20,692 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-05-02 23:21:20,835 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,030 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,189 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,332 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,482 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,637 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,798 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:21,983 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:22,181 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:22,394 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:22,587 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:22,783 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-05-02 23:21:23,047 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-05-02 23:21:23,451 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-02 23:21:23,683 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:23,913 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:24,126 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:24,343 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:24,582 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:24,831 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:25,072 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:25,330 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:25,595 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:25,837 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:26,103 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:21:27,067 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 47 [2021-05-02 23:21:28,291 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 40 [2021-05-02 23:21:28,613 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-05-02 23:21:28,947 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-05-02 23:21:29,331 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-02 23:21:29,732 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:30,126 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:30,514 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:30,868 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:31,223 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:31,601 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:31,998 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:32,438 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:32,938 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:33,380 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-02 23:21:34,613 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 53 [2021-05-02 23:21:35,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 23:21:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:21:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:21:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:21:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:21:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:21:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:21:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:21:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:21:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:21:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-05-02 23:21:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-05-02 23:21:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:21:35,584 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:35,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416652242] [2021-05-02 23:21:35,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416652242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:35,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:35,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:21:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510216142] [2021-05-02 23:21:35,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:21:35,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:21:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2195, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:21:35,586 INFO L87 Difference]: Start difference. First operand 214 states and 219 transitions. Second operand has 49 states, 48 states have (on average 2.5) internal successors, (120), 47 states have internal predecessors, (120), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:21:42,665 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-05-02 23:21:43,193 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-02 23:21:47,077 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-05-02 23:21:47,738 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-02 23:21:57,697 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-02 23:21:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:58,972 INFO L93 Difference]: Finished difference Result 348 states and 368 transitions. [2021-05-02 23:21:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:21:58,976 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.5) internal successors, (120), 47 states have internal predecessors, (120), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 217 [2021-05-02 23:21:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:58,977 INFO L225 Difference]: With dead ends: 348 [2021-05-02 23:21:58,977 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:21:58,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 19985.9ms TimeCoverageRelationStatistics Valid=346, Invalid=4484, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:21:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:21:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2021-05-02 23:21:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 189 states have (on average 1.0211640211640212) internal successors, (193), 189 states have internal predecessors, (193), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:21:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 222 transitions. [2021-05-02 23:21:59,094 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 222 transitions. Word has length 217 [2021-05-02 23:21:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:59,094 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 222 transitions. [2021-05-02 23:21:59,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 2.5) internal successors, (120), 47 states have internal predecessors, (120), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:21:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 222 transitions. [2021-05-02 23:21:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 23:21:59,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:59,095 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:59,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:21:59,095 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2048068108, now seen corresponding path program 40 times [2021-05-02 23:21:59,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:59,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241556057] [2021-05-02 23:21:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:59,107 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:59,108 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-05-02 23:22:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-05-02 23:22:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-05-02 23:22:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-05-02 23:22:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-05-02 23:22:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-05-02 23:22:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-05-02 23:22:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-05-02 23:22:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-05-02 23:22:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-05-02 23:22:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-05-02 23:22:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-05-02 23:22:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:22:02,744 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241556057] [2021-05-02 23:22:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [241556057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:02,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:02,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:22:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543061552] [2021-05-02 23:22:02,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:22:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:22:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:22:02,745 INFO L87 Difference]: Start difference. First operand 217 states and 222 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 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 23:22:09,108 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 17 [2021-05-02 23:22:09,740 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 17 [2021-05-02 23:22:10,181 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 17 [2021-05-02 23:22:10,654 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2021-05-02 23:22:11,111 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 17 [2021-05-02 23:22:11,555 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 15 [2021-05-02 23:22:12,027 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2021-05-02 23:22:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:23,929 INFO L93 Difference]: Finished difference Result 364 states and 376 transitions. [2021-05-02 23:22:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:22:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 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 220 [2021-05-02 23:22:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:23,935 INFO L225 Difference]: With dead ends: 364 [2021-05-02 23:22:23,936 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 23:22:23,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 8993.1ms TimeCoverageRelationStatistics Valid=320, Invalid=3220, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:22:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 23:22:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 222. [2021-05-02 23:22:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:22:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2021-05-02 23:22:24,053 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 220 [2021-05-02 23:22:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:24,054 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2021-05-02 23:22:24,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 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 23:22:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2021-05-02 23:22:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 23:22:24,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:24,056 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:24,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:22:24,056 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1284704045, now seen corresponding path program 41 times [2021-05-02 23:22:24,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:24,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935199835] [2021-05-02 23:22:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:24,068 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:24,069 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:25,127 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-05-02 23:22:25,321 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:25,523 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:25,747 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:25,972 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:26,212 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:26,490 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:26,736 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:26,994 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:27,270 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:27,567 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:27,853 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:28,148 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:28,448 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:22:28,800 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-05-02 23:22:29,057 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-05-02 23:22:29,320 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-02 23:22:29,642 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:29,965 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:30,306 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:30,638 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:30,964 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:31,277 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:31,596 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:31,923 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:32,260 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:32,640 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:33,014 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:22:34,307 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 43 [2021-05-02 23:22:35,752 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 53 [2021-05-02 23:22:36,689 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-05-02 23:22:37,132 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-02 23:22:37,598 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-02 23:22:38,068 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:38,525 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:38,964 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:39,416 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:39,928 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:40,440 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:40,938 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:41,457 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:41,935 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:42,436 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:42,953 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:22:44,904 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 48 [2021-05-02 23:22:45,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:22:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:22:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:22:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:22:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:22:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:22:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:22:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:22:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:22:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-05-02 23:22:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:46,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-05-02 23:22:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:46,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-05-02 23:22:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:22:46,019 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:46,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935199835] [2021-05-02 23:22:46,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935199835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:46,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:46,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:22:46,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989595077] [2021-05-02 23:22:46,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:22:46,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:22:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:22:46,022 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand has 51 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:22:52,437 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-02 23:22:56,211 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:22:56,737 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:22:59,465 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:23:00,022 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:23:02,123 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:23:02,740 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:23:03,323 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:23:03,883 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:23:04,581 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:23:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:06,318 INFO L93 Difference]: Finished difference Result 382 states and 407 transitions. [2021-05-02 23:23:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:23:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 225 [2021-05-02 23:23:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:06,328 INFO L225 Difference]: With dead ends: 382 [2021-05-02 23:23:06,328 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 23:23:06,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 25121.6ms TimeCoverageRelationStatistics Valid=442, Invalid=4814, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:23:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 23:23:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2021-05-02 23:23:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 312 states have (on average 1.0224358974358974) internal successors, (319), 313 states have internal predecessors, (319), 28 states have call successors, (28), 15 states have call predecessors, (28), 13 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:23:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 374 transitions. [2021-05-02 23:23:06,544 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 374 transitions. Word has length 225 [2021-05-02 23:23:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:06,544 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 374 transitions. [2021-05-02 23:23:06,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:23:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 374 transitions. [2021-05-02 23:23:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 23:23:06,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:06,553 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:06,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:23:06,553 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash -392212948, now seen corresponding path program 42 times [2021-05-02 23:23:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:06,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16485210] [2021-05-02 23:23:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:06,565 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:06,566 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-05-02 23:23:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-05-02 23:23:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-05-02 23:23:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-05-02 23:23:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-05-02 23:23:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-05-02 23:23:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-05-02 23:23:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-05-02 23:23:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-05-02 23:23:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-05-02 23:23:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-05-02 23:23:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-05-02 23:23:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:23:11,660 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16485210] [2021-05-02 23:23:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [16485210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:11,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:11,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:23:11,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867248158] [2021-05-02 23:23:11,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:23:11,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:11,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:23:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:23:11,662 INFO L87 Difference]: Start difference. First operand 354 states and 374 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 34 states have internal predecessors, (107), 2 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 23:23:20,950 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 17 [2021-05-02 23:23:21,728 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 17 [2021-05-02 23:23:22,627 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 17 [2021-05-02 23:23:23,734 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 17 [2021-05-02 23:23:24,675 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2021-05-02 23:23:25,534 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 17 [2021-05-02 23:23:26,394 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 15 [2021-05-02 23:23:27,257 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 17 [2021-05-02 23:23:28,030 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2021-05-02 23:23:29,077 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 17 [2021-05-02 23:23:29,924 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2021-05-02 23:23:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:57,189 INFO L93 Difference]: Finished difference Result 658 states and 715 transitions. [2021-05-02 23:23:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:23:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 34 states have internal predecessors, (107), 2 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 228 [2021-05-02 23:23:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:57,201 INFO L225 Difference]: With dead ends: 658 [2021-05-02 23:23:57,201 INFO L226 Difference]: Without dead ends: 474 [2021-05-02 23:23:57,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 12372.6ms TimeCoverageRelationStatistics Valid=350, Invalid=3682, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:23:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-02 23:23:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 365. [2021-05-02 23:23:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 323 states have (on average 1.0247678018575852) internal successors, (331), 324 states have internal predecessors, (331), 28 states have call successors, (28), 15 states have call predecessors, (28), 13 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:23:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 386 transitions. [2021-05-02 23:23:57,433 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 386 transitions. Word has length 228 [2021-05-02 23:23:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:57,433 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 386 transitions. [2021-05-02 23:23:57,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 34 states have internal predecessors, (107), 2 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 23:23:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 386 transitions. [2021-05-02 23:23:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 23:23:57,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:57,435 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:57,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:23:57,435 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1294134189, now seen corresponding path program 43 times [2021-05-02 23:23:57,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:57,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063883054] [2021-05-02 23:23:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:57,453 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:57,455 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:58,494 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-05-02 23:23:58,690 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:23:58,891 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:23:59,097 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:23:59,312 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:23:59,527 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:23:59,755 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:23:59,964 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:24:00,255 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:24:00,509 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:24:00,754 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:24:00,987 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:24:01,219 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-02 23:24:01,911 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-02 23:24:02,191 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-05-02 23:24:02,691 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-05-02 23:24:03,086 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-02 23:24:03,524 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 23:24:03,987 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:24:04,480 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:04,997 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:05,535 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-02 23:24:06,100 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:06,692 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:07,348 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 23:24:07,972 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:08,606 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:09,256 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:09,923 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:10,554 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:24:11,637 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-05-02 23:24:12,699 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-05-02 23:24:13,258 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-05-02 23:24:13,856 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-02 23:24:14,574 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 28 [2021-05-02 23:24:15,375 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-05-02 23:24:16,097 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-05-02 23:24:16,879 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 28 [2021-05-02 23:24:17,660 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-05-02 23:24:18,454 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-05-02 23:24:19,202 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 27 [2021-05-02 23:24:20,024 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-05-02 23:24:20,845 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-05-02 23:24:21,625 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2021-05-02 23:24:22,409 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-05-02 23:24:23,133 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 28 [2021-05-02 23:24:25,113 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 153 DAG size of output: 56 [2021-05-02 23:24:26,432 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-05-02 23:24:27,455 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-05-02 23:24:28,466 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-05-02 23:24:29,512 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-02 23:24:30,534 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-02 23:24:31,453 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-02 23:24:32,427 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-02 23:24:33,401 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-02 23:24:34,404 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-05-02 23:24:35,417 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-05-02 23:24:36,510 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-02 23:24:37,613 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-02 23:24:38,715 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-05-02 23:24:39,802 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-02 23:24:40,851 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-05-02 23:24:42,877 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 125 DAG size of output: 76 [2021-05-02 23:24:44,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:24:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:24:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:24:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:24:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:24:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:24:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:24:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:24:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:24:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-05-02 23:24:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-05-02 23:24:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-05-02 23:24:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-05-02 23:24:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:24:44,668 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:44,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063883054] [2021-05-02 23:24:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063883054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:44,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:44,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:24:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19163057] [2021-05-02 23:24:44,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:24:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:24:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4409, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:24:44,669 INFO L87 Difference]: Start difference. First operand 365 states and 386 transitions. Second operand has 69 states, 68 states have (on average 2.4558823529411766) internal successors, (167), 67 states have internal predecessors, (167), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:24:50,582 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-05-02 23:24:51,762 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-02 23:24:52,855 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:24:53,875 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:24:54,907 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-02 23:24:55,893 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:24:56,933 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:24:57,997 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:24:59,066 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:25:00,110 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:25:01,090 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:25:02,119 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:25:03,396 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-02 23:25:05,065 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-05-02 23:25:06,484 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-05-02 23:25:08,300 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-05-02 23:25:08,889 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:25:10,367 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-05-02 23:25:11,071 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 23:25:12,211 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-05-02 23:25:13,965 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-05-02 23:25:14,662 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:25:15,817 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-05-02 23:25:16,489 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:25:17,506 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-02 23:25:19,055 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-02 23:25:20,572 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-05-02 23:25:22,027 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-05-02 23:25:23,558 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-02 23:25:25,228 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-05-02 23:25:26,963 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-05-02 23:25:27,649 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:25:28,805 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-02 23:25:29,695 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2021-05-02 23:25:30,902 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-05-02 23:25:32,234 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-05-02 23:25:33,874 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 65 [2021-05-02 23:25:34,951 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:25:36,238 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:25:37,648 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:25:39,178 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:25:40,791 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:25:42,109 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:25:43,280 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 23:25:44,448 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:25:45,683 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:25:46,994 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:25:48,176 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:25:49,433 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:25:50,711 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:25:52,698 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2021-05-02 23:25:53,352 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 23:25:55,120 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-05-02 23:25:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:55,668 INFO L93 Difference]: Finished difference Result 411 states and 433 transitions. [2021-05-02 23:25:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:25:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.4558823529411766) internal successors, (167), 67 states have internal predecessors, (167), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 233 [2021-05-02 23:25:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:55,679 INFO L225 Difference]: With dead ends: 411 [2021-05-02 23:25:55,679 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 23:25:55,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 82084.0ms TimeCoverageRelationStatistics Valid=867, Invalid=15903, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:25:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 23:25:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 373. [2021-05-02 23:25:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 329 states have (on average 1.0243161094224924) internal successors, (337), 330 states have internal predecessors, (337), 29 states have call successors, (29), 16 states have call predecessors, (29), 14 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:25:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 394 transitions. [2021-05-02 23:25:55,942 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 394 transitions. Word has length 233 [2021-05-02 23:25:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:55,943 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 394 transitions. [2021-05-02 23:25:55,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 2.4558823529411766) internal successors, (167), 67 states have internal predecessors, (167), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:25:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 394 transitions. [2021-05-02 23:25:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 23:25:55,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:55,944 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:55,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:25:55,944 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1387734999, now seen corresponding path program 44 times [2021-05-02 23:25:55,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:55,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892608843] [2021-05-02 23:25:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:55,961 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:55,962 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:57,521 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-05-02 23:25:57,883 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:25:58,196 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:25:58,558 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:25:58,926 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:25:59,331 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:25:59,817 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:00,296 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:00,752 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:01,179 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:01,610 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:02,018 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:02,432 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:02,913 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:03,431 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:26:04,084 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-05-02 23:26:04,595 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-02 23:26:05,080 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-02 23:26:05,639 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:06,184 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:06,696 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:07,246 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:07,801 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:08,361 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:08,975 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:09,667 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:10,418 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:11,050 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:11,672 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:26:13,652 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 132 DAG size of output: 43 [2021-05-02 23:26:16,292 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 143 DAG size of output: 54 [2021-05-02 23:26:18,088 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-05-02 23:26:18,910 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-05-02 23:26:20,692 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-05-02 23:26:21,379 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-05-02 23:26:22,146 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-02 23:26:23,033 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:23,974 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:24,877 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:25,774 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:26,587 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:27,390 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:28,247 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:29,059 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:29,865 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:30,649 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:31,476 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:26:34,369 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 159 DAG size of output: 57 [2021-05-02 23:26:36,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:26:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:26:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:26:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:26:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:26:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:26:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:26:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:26:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-05-02 23:26:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-05-02 23:26:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-05-02 23:26:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-05-02 23:26:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:26:36,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:36,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892608843] [2021-05-02 23:26:36,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892608843] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:36,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:36,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:26:36,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92063209] [2021-05-02 23:26:36,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:26:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:26:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:26:36,140 INFO L87 Difference]: Start difference. First operand 373 states and 394 transitions. Second operand has 54 states, 53 states have (on average 2.452830188679245) internal successors, (130), 52 states have internal predecessors, (130), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:26:47,491 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-02 23:26:55,556 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:26:56,422 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:26:56,925 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:26:57,491 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 23:26:58,882 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:26:59,814 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:00,570 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:01,402 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:02,252 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:03,140 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:04,084 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:05,141 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:06,182 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:07,182 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:08,217 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:27:09,504 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:27:09,847 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:27:10,273 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 23:27:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:12,826 INFO L93 Difference]: Finished difference Result 582 states and 627 transitions. [2021-05-02 23:27:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:27:12,840 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.452830188679245) internal successors, (130), 52 states have internal predecessors, (130), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 233 [2021-05-02 23:27:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:12,842 INFO L225 Difference]: With dead ends: 582 [2021-05-02 23:27:12,842 INFO L226 Difference]: Without dead ends: 580 [2021-05-02 23:27:12,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 45882.6ms TimeCoverageRelationStatistics Valid=463, Invalid=5389, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:27:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-05-02 23:27:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 502. [2021-05-02 23:27:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 446 states have (on average 1.0246636771300448) internal successors, (457), 448 states have internal predecessors, (457), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:27:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 538 transitions. [2021-05-02 23:27:13,196 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 538 transitions. Word has length 233 [2021-05-02 23:27:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:13,196 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 538 transitions. [2021-05-02 23:27:13,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 2.452830188679245) internal successors, (130), 52 states have internal predecessors, (130), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:27:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 538 transitions. [2021-05-02 23:27:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 23:27:13,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:13,198 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:13,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:27:13,198 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2056197168, now seen corresponding path program 45 times [2021-05-02 23:27:13,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:13,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851953816] [2021-05-02 23:27:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:13,227 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:13,228 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-05-02 23:27:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-05-02 23:27:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-05-02 23:27:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-05-02 23:27:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-05-02 23:27:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-05-02 23:27:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-05-02 23:27:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-05-02 23:27:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-05-02 23:27:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-05-02 23:27:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-05-02 23:27:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-05-02 23:27:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:27:21,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851953816] [2021-05-02 23:27:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [851953816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:21,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:21,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:27:21,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463287386] [2021-05-02 23:27:21,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:27:21,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:27:21,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:27:21,728 INFO L87 Difference]: Start difference. First operand 502 states and 538 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 2 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 23:27:33,466 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-05-02 23:27:37,207 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 15 [2021-05-02 23:27:38,916 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 17 [2021-05-02 23:27:40,563 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 17 [2021-05-02 23:27:42,413 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 17 [2021-05-02 23:27:44,065 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 15 [2021-05-02 23:27:45,478 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2021-05-02 23:27:46,914 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2021-05-02 23:27:48,552 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 15 [2021-05-02 23:27:49,747 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 15 [2021-05-02 23:27:51,008 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 17 [2021-05-02 23:27:52,043 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 15 [2021-05-02 23:27:53,052 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 15 [2021-05-02 23:27:54,456 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2021-05-02 23:27:56,648 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2021-05-02 23:28:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:33,216 INFO L93 Difference]: Finished difference Result 1002 states and 1108 transitions. [2021-05-02 23:28:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:28:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 2 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 236 [2021-05-02 23:28:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:33,230 INFO L225 Difference]: With dead ends: 1002 [2021-05-02 23:28:33,230 INFO L226 Difference]: Without dead ends: 761 [2021-05-02 23:28:33,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 21534.8ms TimeCoverageRelationStatistics Valid=381, Invalid=4175, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:28:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-05-02 23:28:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 519. [2021-05-02 23:28:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 463 states have (on average 1.0280777537796977) internal successors, (476), 465 states have internal predecessors, (476), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:28:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 557 transitions. [2021-05-02 23:28:33,610 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 557 transitions. Word has length 236 [2021-05-02 23:28:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:33,610 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 557 transitions. [2021-05-02 23:28:33,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 2 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 23:28:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 557 transitions. [2021-05-02 23:28:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-05-02 23:28:33,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:33,612 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:33,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:28:33,612 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1426941063, now seen corresponding path program 46 times [2021-05-02 23:28:33,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:33,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522773535] [2021-05-02 23:28:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:33,627 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:33,628 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,015 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-05-02 23:28:39,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-05-02 23:28:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-05-02 23:28:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-05-02 23:28:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-05-02 23:28:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-05-02 23:28:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-05-02 23:28:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-05-02 23:28:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-05-02 23:28:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-05-02 23:28:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-05-02 23:28:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-05-02 23:28:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-05-02 23:28:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-05-02 23:28:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-05-02 23:28:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 23:28:39,496 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:39,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522773535] [2021-05-02 23:28:39,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522773535] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:39,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:28:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160445697] [2021-05-02 23:28:39,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:28:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:28:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:28:39,498 INFO L87 Difference]: Start difference. First operand 519 states and 557 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 23:29:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:03,191 INFO L93 Difference]: Finished difference Result 714 states and 759 transitions. [2021-05-02 23:29:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:29:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 241 [2021-05-02 23:29:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:03,202 INFO L225 Difference]: With dead ends: 714 [2021-05-02 23:29:03,202 INFO L226 Difference]: Without dead ends: 422 [2021-05-02 23:29:03,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 7120.1ms TimeCoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:29:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-02 23:29:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 378. [2021-05-02 23:29:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 336 states have (on average 1.0238095238095237) internal successors, (344), 337 states have internal predecessors, (344), 28 states have call successors, (28), 15 states have call predecessors, (28), 13 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:29:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 399 transitions. [2021-05-02 23:29:03,451 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 399 transitions. Word has length 241 [2021-05-02 23:29:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:03,451 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 399 transitions. [2021-05-02 23:29:03,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 23:29:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 399 transitions. [2021-05-02 23:29:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-05-02 23:29:03,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:03,453 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:03,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:29:03,453 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:03,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash -471869775, now seen corresponding path program 47 times [2021-05-02 23:29:03,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:03,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127747215] [2021-05-02 23:29:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:03,467 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:03,468 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:04,780 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-05-02 23:29:04,988 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:05,220 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:05,445 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:05,686 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:05,896 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:06,119 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:06,348 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:06,573 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:06,816 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:07,070 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:07,348 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:07,628 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-02 23:29:08,065 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-02 23:29:08,372 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2021-05-02 23:29:09,023 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2021-05-02 23:29:09,424 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 19 [2021-05-02 23:29:09,952 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-05-02 23:29:10,273 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-05-02 23:29:10,578 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-05-02 23:29:10,934 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-05-02 23:29:11,302 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:11,671 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:12,077 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-05-02 23:29:12,479 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:12,869 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:13,282 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:13,715 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:14,135 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:14,511 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:14,921 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:15,336 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-02 23:29:16,159 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2021-05-02 23:29:16,883 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2021-05-02 23:29:17,868 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 42 [2021-05-02 23:29:18,602 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-05-02 23:29:26,718 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-05-02 23:29:27,829 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 50 [2021-05-02 23:29:28,863 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2021-05-02 23:29:29,556 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-05-02 23:29:30,073 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-05-02 23:29:30,584 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-05-02 23:29:31,122 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-05-02 23:29:31,719 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-02 23:29:32,386 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-02 23:29:33,008 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39