/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/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:09:02,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:09:02,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:09:02,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:09:02,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:09:02,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:09:02,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:09:02,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:09:02,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:09:02,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:09:02,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:09:02,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:09:02,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:09:02,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:09:02,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:09:02,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:09:02,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:09:02,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:09:02,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:09:02,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:09:02,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:09:02,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:09:02,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:09:02,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:09:02,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:09:02,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:09:02,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:09:02,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:09:02,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:09:02,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:09:02,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:09:02,778 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:09:02,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:09:03,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:09:03,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:09:03,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:09:03,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:09:03,019 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:09:03,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2021-05-06 11:09:03,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d394fd76f/f3e6592d72f6483bb80e5d193e8c28a1/FLAGfb44be97c [2021-05-06 11:09:03,420 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:09:03,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2021-05-06 11:09:03,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d394fd76f/f3e6592d72f6483bb80e5d193e8c28a1/FLAGfb44be97c [2021-05-06 11:09:03,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d394fd76f/f3e6592d72f6483bb80e5d193e8c28a1 [2021-05-06 11:09:03,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:09:03,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:09:03,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:09:03,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:09:03,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:09:03,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:09:03" (1/1) ... [2021-05-06 11:09:03,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16efee97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:03, skipping insertion in model container [2021-05-06 11:09:03,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:09:03" (1/1) ... [2021-05-06 11:09:03,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:09:03,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:09:03,947 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/heavy-2.c[600,613] [2021-05-06 11:09:03,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:09:04,012 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:09:04,032 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/heavy-2.c[600,613] [2021-05-06 11:09:04,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:09:04,087 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:09:04,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04 WrapperNode [2021-05-06 11:09:04,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:09:04,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:09:04,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:09:04,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:09:04,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (1/1) ... [2021-05-06 11:09:04,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:09:04,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:09:04,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:09:04,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:09:04,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (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 [2021-05-06 11:09:04,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:09:04,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:09:04,219 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:09:04,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:09:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:09:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-06 11:09:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:09:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:09:04,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:09:04,509 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 11:09:04,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:09:04 BoogieIcfgContainer [2021-05-06 11:09:04,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:09:04,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:09:04,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:09:04,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:09:04,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:09:03" (1/3) ... [2021-05-06 11:09:04,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650d67cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:09:04, skipping insertion in model container [2021-05-06 11:09:04,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:04" (2/3) ... [2021-05-06 11:09:04,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650d67cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:09:04, skipping insertion in model container [2021-05-06 11:09:04,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:09:04" (3/3) ... [2021-05-06 11:09:04,518 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-05-06 11:09:04,522 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:09:04,525 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:09:04,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:09:04,560 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:09:04,560 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:09:04,561 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:09:04,561 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:09:04,561 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:09:04,561 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:09:04,561 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:09:04,561 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:09:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-06 11:09:04,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:04,587 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:04,587 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2021-05-06 11:09:04,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:04,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894510640] [2021-05-06 11:09:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:04,644 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:04,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:04,801 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:04,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894510640] [2021-05-06 11:09:04,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [894510640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:04,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:04,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:09:04,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009638086] [2021-05-06 11:09:04,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:09:04,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:09:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:09:04,819 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:04,908 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2021-05-06 11:09:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:09:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-06 11:09:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:04,915 INFO L225 Difference]: With dead ends: 42 [2021-05-06 11:09:04,915 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 11:09:04,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:09:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 11:09:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-05-06 11:09:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-06 11:09:04,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-05-06 11:09:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:04,942 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-06 11:09:04,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-06 11:09:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-06 11:09:04,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:04,944 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:04,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:09:04,944 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2021-05-06 11:09:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:04,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8636815] [2021-05-06 11:09:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:04,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:05,090 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:05,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8636815] [2021-05-06 11:09:05,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [8636815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:05,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:05,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:09:05,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169050797] [2021-05-06 11:09:05,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:09:05,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:09:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:09:05,091 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:05,203 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-06 11:09:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:09:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-06 11:09:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:05,211 INFO L225 Difference]: With dead ends: 36 [2021-05-06 11:09:05,211 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 11:09:05,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:09:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 11:09:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2021-05-06 11:09:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-06 11:09:05,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-05-06 11:09:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:05,216 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-06 11:09:05,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-06 11:09:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:09:05,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:05,217 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:05,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:09:05,217 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2021-05-06 11:09:05,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:05,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494235440] [2021-05-06 11:09:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:05,250 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:05,270 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-06 11:09:05,277 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:05,280 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:09:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:05,391 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:05,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494235440] [2021-05-06 11:09:05,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [494235440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:05,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:05,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:09:05,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127709376] [2021-05-06 11:09:05,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:09:05,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:05,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:09:05,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:09:05,398 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:05,551 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 11:09:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:09:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:09:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:05,553 INFO L225 Difference]: With dead ends: 48 [2021-05-06 11:09:05,553 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 11:09:05,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:09:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 11:09:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2021-05-06 11:09:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 11:09:05,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-05-06 11:09:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:05,563 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 11:09:05,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 11:09:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 11:09:05,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:05,564 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:05,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:09:05,564 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2021-05-06 11:09:05,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:05,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071738101] [2021-05-06 11:09:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:05,574 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:05,586 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-06 11:09:05,591 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:05,600 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:05,613 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-06 11:09:05,620 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:05,624 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:09:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:05,742 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:05,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071738101] [2021-05-06 11:09:05,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071738101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:05,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:05,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:09:05,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136226010] [2021-05-06 11:09:05,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:09:05,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:09:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:09:05,744 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:05,860 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-06 11:09:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:09:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 11:09:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:05,860 INFO L225 Difference]: With dead ends: 36 [2021-05-06 11:09:05,861 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 11:09:05,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:09:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 11:09:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-05-06 11:09:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-06 11:09:05,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-05-06 11:09:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:05,868 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-06 11:09:05,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-06 11:09:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:09:05,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:05,869 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:05,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:09:05,869 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2021-05-06 11:09:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:05,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987080031] [2021-05-06 11:09:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:06,389 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:09:06,402 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,402 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,404 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:06,418 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:09:06,427 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:06,434 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,434 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,437 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,437 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,439 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,439 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,441 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,441 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,443 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,443 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,445 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,445 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,449 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,449 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,451 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,451 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,478 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:06,501 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:09:06,513 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:06,514 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:09:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:12,683 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-06 11:09:12,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:14,732 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-06 11:09:14,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:14,742 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:14,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987080031] [2021-05-06 11:09:14,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [987080031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:14,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:14,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:09:14,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214192030] [2021-05-06 11:09:14,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:09:14,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:09:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=34, Unknown=1, NotChecked=0, Total=56 [2021-05-06 11:09:14,744 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:20,930 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-06 11:09:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:09:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 11:09:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:20,931 INFO L225 Difference]: With dead ends: 37 [2021-05-06 11:09:20,931 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 11:09:20,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10252.8ms TimeCoverageRelationStatistics Valid=39, Invalid=69, Unknown=2, NotChecked=0, Total=110 [2021-05-06 11:09:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 11:09:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2021-05-06 11:09:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-06 11:09:20,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-05-06 11:09:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:20,936 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-06 11:09:20,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-06 11:09:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 11:09:20,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:20,936 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:20,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:09:20,936 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 2 times [2021-05-06 11:09:20,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:20,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034243249] [2021-05-06 11:09:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:22,808 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-05-06 11:09:24,322 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2021-05-06 11:09:24,337 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,338 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,345 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:24,360 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:09:24,374 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:24,378 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,378 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,380 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,381 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,382 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,382 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,384 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,384 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,386 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,386 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,387 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,387 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,389 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,389 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,390 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,390 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,392 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,392 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,394 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,394 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,396 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,396 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,398 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,398 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,399 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,400 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,401 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,401 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,403 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,403 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,404 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:24,404 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:24,420 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:24,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:09:24,456 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:24,457 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:09:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:24,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:30,617 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-06 11:09:30,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:32,654 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-06 11:09:32,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:40,757 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-06 11:09:40,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:42,800 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-06 11:09:42,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:09:42,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:42,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034243249] [2021-05-06 11:09:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034243249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:42,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:42,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:09:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880424584] [2021-05-06 11:09:42,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:09:42,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:09:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=58, Unknown=3, NotChecked=0, Total=90 [2021-05-06 11:09:42,805 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:53,034 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-06 11:09:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:09:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 11:09:53,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:53,035 INFO L225 Difference]: With dead ends: 39 [2021-05-06 11:09:53,035 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 11:09:53,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20373.5ms TimeCoverageRelationStatistics Valid=47, Invalid=105, Unknown=4, NotChecked=0, Total=156 [2021-05-06 11:09:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 11:09:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-05-06 11:09:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-06 11:09:53,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-05-06 11:09:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:53,039 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-06 11:09:53,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-06 11:09:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 11:09:53,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:53,039 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:53,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:09:53,039 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 3 times [2021-05-06 11:09:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:53,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335036324] [2021-05-06 11:09:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:54,479 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2021-05-06 11:09:56,135 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2021-05-06 11:09:56,174 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,174 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,178 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:56,194 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:09:56,211 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:56,216 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,216 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,217 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,217 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,219 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,219 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,220 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,220 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,222 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,222 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,224 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,224 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,226 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,227 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,228 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,229 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,231 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,232 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,233 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,233 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,234 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,234 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,235 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,235 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,236 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,236 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,237 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,238 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,239 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,239 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,240 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:56,240 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:56,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:09:56,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:09:56,299 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:09:56,301 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:09:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:02,458 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-06 11:10:02,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:04,495 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-06 11:10:04,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:12,596 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-06 11:10:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:14,652 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-06 11:10:14,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:22,760 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-05-06 11:10:22,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:24,863 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 95 [2021-05-06 11:10:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:24,881 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:10:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335036324] [2021-05-06 11:10:24,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [335036324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:10:24,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:10:24,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:10:24,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060134234] [2021-05-06 11:10:24,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:10:24,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:10:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:10:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=90, Unknown=5, NotChecked=0, Total=132 [2021-05-06 11:10:24,882 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:10:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:10:39,188 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-05-06 11:10:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:10:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 11:10:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:10:39,189 INFO L225 Difference]: With dead ends: 41 [2021-05-06 11:10:39,189 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:10:39,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30619.0ms TimeCoverageRelationStatistics Valid=55, Invalid=149, Unknown=6, NotChecked=0, Total=210 [2021-05-06 11:10:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:10:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-05-06 11:10:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:10:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 11:10:39,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-05-06 11:10:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:10:39,193 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 11:10:39,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:10:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 11:10:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 11:10:39,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:10:39,194 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:10:39,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:10:39,194 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:10:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:10:39,194 INFO L82 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 4 times [2021-05-06 11:10:39,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:10:39,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190335040] [2021-05-06 11:10:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:10:39,728 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:10:40,263 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:10:40,279 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,279 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,286 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:40,312 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:10:40,321 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:10:40,326 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,326 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,328 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,328 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,329 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,329 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,333 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,333 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,343 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,343 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,344 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,344 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,345 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,345 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,346 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:10:40,346 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:10:40,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:40,416 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:10:40,429 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:10:40,432 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:10:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:40,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:10:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:10:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:46,625 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-06 11:10:46,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:48,667 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-06 11:10:48,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:56,765 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-06 11:10:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:10:58,810 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-06 11:10:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:06,921 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-05-06 11:11:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:08,976 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-06 11:11:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:17,086 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-05-06 11:11:17,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:19,161 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 94 [2021-05-06 11:11:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:19,164 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:11:19,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190335040] [2021-05-06 11:11:19,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190335040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:11:19,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:11:19,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:11:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127290525] [2021-05-06 11:11:19,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 11:11:19,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:11:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 11:11:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=130, Unknown=7, NotChecked=0, Total=182 [2021-05-06 11:11:19,166 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:11:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:11:37,567 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-06 11:11:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:11:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 11:11:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:11:37,568 INFO L225 Difference]: With dead ends: 43 [2021-05-06 11:11:37,568 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 11:11:37,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 40724.8ms TimeCoverageRelationStatistics Valid=63, Invalid=201, Unknown=8, NotChecked=0, Total=272 [2021-05-06 11:11:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 11:11:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-05-06 11:11:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:11:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-06 11:11:37,573 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-05-06 11:11:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:11:37,573 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-06 11:11:37,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:11:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-06 11:11:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 11:11:37,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:11:37,574 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:11:37,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:11:37,574 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:11:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:11:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 5 times [2021-05-06 11:11:37,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:11:37,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471606306] [2021-05-06 11:11:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:11:39,337 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-05-06 11:11:41,074 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-05-06 11:11:41,094 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,094 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,095 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:11:41,110 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:11:41,120 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:11:41,123 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,123 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,124 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,124 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,125 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,125 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,126 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,126 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,127 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,127 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,128 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,128 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,129 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,129 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,130 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,130 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,131 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,131 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,132 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,132 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,133 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,133 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,134 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,134 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,135 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,135 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,136 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,136 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,137 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,137 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,138 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:11:41,138 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:11:41,151 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:11:41,172 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:11:41,183 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:11:41,184 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:11:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:11:41,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:11:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:11:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:11:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:47,304 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-06 11:11:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:49,338 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-06 11:11:49,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:57,433 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-06 11:11:57,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:11:59,474 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-06 11:11:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:07,590 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-05-06 11:12:07,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:09,639 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 82 [2021-05-06 11:12:09,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:17,757 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-05-06 11:12:17,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:19,822 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 105 [2021-05-06 11:12:19,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:28,022 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-05-06 11:12:28,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:30,126 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 127 [2021-05-06 11:12:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:12:30,129 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:12:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471606306] [2021-05-06 11:12:30,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [471606306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:12:30,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:12:30,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:12:30,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010870132] [2021-05-06 11:12:30,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:12:30,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:12:30,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:12:30,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=178, Unknown=9, NotChecked=0, Total=240 [2021-05-06 11:12:30,131 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:12:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:12:52,692 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 11:12:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:12:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 11:12:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:12:52,692 INFO L225 Difference]: With dead ends: 37 [2021-05-06 11:12:52,692 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 11:12:52,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 50997.8ms TimeCoverageRelationStatistics Valid=71, Invalid=261, Unknown=10, NotChecked=0, Total=342 [2021-05-06 11:12:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 11:12:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 11:12:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:12:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-06 11:12:52,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2021-05-06 11:12:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:12:52,698 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-06 11:12:52,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:12:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-06 11:12:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 11:12:52,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:12:52,699 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:12:52,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:12:52,699 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:12:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:12:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 6 times [2021-05-06 11:12:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:12:52,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682959230] [2021-05-06 11:12:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:12:53,971 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-06 11:12:54,779 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-06 11:12:54,801 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,802 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,803 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:12:54,818 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:12:54,827 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:12:54,829 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,829 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,830 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,830 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,831 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,831 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,832 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,832 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,833 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,833 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,833 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,834 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,834 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,834 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,835 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,835 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,836 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,836 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,837 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,837 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,838 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,838 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,839 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,839 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,841 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,841 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,841 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,842 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,842 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,842 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,843 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:12:54,843 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:12:54,872 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:12:54,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:12:54,907 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:12:54,908 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:12:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:12:54,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:12:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:12:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:12:54,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:01,084 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-06 11:13:01,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:03,118 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-06 11:13:03,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:11,202 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-06 11:13:11,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:13,254 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-06 11:13:13,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:21,358 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-06 11:13:21,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:23,410 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-06 11:13:23,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:31,519 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-05-06 11:13:31,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:33,583 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 76 [2021-05-06 11:13:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:41,719 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-05-06 11:13:41,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:43,798 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 102 [2021-05-06 11:13:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:51,961 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-05-06 11:13:51,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:54,065 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 117 [2021-05-06 11:13:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:13:54,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:13:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682959230] [2021-05-06 11:13:54,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682959230] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:13:54,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:13:54,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 11:13:54,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727223872] [2021-05-06 11:13:54,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 11:13:54,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:13:54,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 11:13:54,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2021-05-06 11:13:54,070 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:14:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:14:20,854 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-06 11:14:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 11:14:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 11:14:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:14:20,854 INFO L225 Difference]: With dead ends: 47 [2021-05-06 11:14:20,855 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 11:14:20,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61250.4ms TimeCoverageRelationStatistics Valid=79, Invalid=329, Unknown=12, NotChecked=0, Total=420 [2021-05-06 11:14:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 11:14:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-05-06 11:14:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:14:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 11:14:20,861 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-05-06 11:14:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:14:20,861 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 11:14:20,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:14:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 11:14:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 11:14:20,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:14:20,862 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:14:20,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 11:14:20,862 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:14:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:14:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 7 times [2021-05-06 11:14:20,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:14:20,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316541906] [2021-05-06 11:14:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:14:21,396 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:14:22,191 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-06 11:14:22,218 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,218 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,220 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:14:22,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:14:22,250 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:14:22,253 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,253 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,254 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,254 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,255 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,255 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,256 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,256 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,257 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,257 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,259 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,259 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,260 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,260 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,261 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,261 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,262 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,262 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,262 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,262 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,263 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,263 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,264 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,264 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,265 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,265 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,266 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,266 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,267 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,267 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,268 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:14:22,268 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:14:22,283 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:14:22,305 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:14:22,317 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:14:22,317 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:14:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:14:22,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:14:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:14:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:14:22,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:28,459 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-06 11:14:28,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:30,493 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 50 [2021-05-06 11:14:30,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:38,585 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-06 11:14:38,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:40,629 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-06 11:14:40,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:48,730 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-05-06 11:14:48,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:50,784 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-06 11:14:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:14:58,925 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:14:58,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:00,988 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 71 [2021-05-06 11:15:00,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:09,122 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-05-06 11:15:09,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:11,213 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 81 [2021-05-06 11:15:11,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:19,381 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-05-06 11:15:19,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:21,474 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:15:21,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:29,649 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-05-06 11:15:29,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:31,753 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 106 [2021-05-06 11:15:31,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:15:31,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:15:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316541906] [2021-05-06 11:15:31,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [316541906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:15:31,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:15:31,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 11:15:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785499366] [2021-05-06 11:15:31,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 11:15:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:15:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 11:15:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=298, Unknown=13, NotChecked=0, Total=380 [2021-05-06 11:15:31,757 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:16:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:16:02,603 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-06 11:16:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:16:02,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 11:16:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:16:02,604 INFO L225 Difference]: With dead ends: 49 [2021-05-06 11:16:02,604 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 11:16:02,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 71508.8ms TimeCoverageRelationStatistics Valid=87, Invalid=405, Unknown=14, NotChecked=0, Total=506 [2021-05-06 11:16:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 11:16:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-06 11:16:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:16:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-06 11:16:02,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2021-05-06 11:16:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:16:02,613 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-06 11:16:02,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:16:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-06 11:16:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 11:16:02,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:16:02,614 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:16:02,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 11:16:02,614 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:16:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:16:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 8 times [2021-05-06 11:16:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:16:02,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065729310] [2021-05-06 11:16:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:16:03,456 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-06 11:16:04,048 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:16:04,068 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,068 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,069 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:16:04,085 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:16:04,096 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:16:04,099 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,099 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,100 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,100 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,101 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,101 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,102 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,102 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,103 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,103 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,104 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,104 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,105 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,105 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,106 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:16:04,106 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:16:04,127 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:16:04,155 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:16:04,168 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:16:04,170 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:16:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:16:04,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:16:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:16:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:16:04,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:10,342 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-06 11:16:10,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:12,378 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 50 [2021-05-06 11:16:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:20,467 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-06 11:16:20,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:22,530 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-06 11:16:22,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:30,633 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-06 11:16:30,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:32,681 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 72 [2021-05-06 11:16:32,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:40,828 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-05-06 11:16:40,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:42,891 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 89 [2021-05-06 11:16:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:51,031 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-05-06 11:16:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:16:53,108 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 111 [2021-05-06 11:16:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:01,321 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 126 DAG size of output: 124 [2021-05-06 11:17:01,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:03,429 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 133 [2021-05-06 11:17:03,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:11,669 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 155 DAG size of output: 153 [2021-05-06 11:17:11,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:13,793 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 156 [2021-05-06 11:17:13,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:21,992 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-05-06 11:17:21,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:24,166 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 177 [2021-05-06 11:17:24,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:17:24,169 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:17:24,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065729310] [2021-05-06 11:17:24,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065729310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:17:24,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:17:24,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 11:17:24,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062729368] [2021-05-06 11:17:24,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 11:17:24,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:17:24,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 11:17:24,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=370, Unknown=15, NotChecked=0, Total=462 [2021-05-06 11:17:24,171 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:17:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:17:59,232 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-06 11:17:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 11:17:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 11:17:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:17:59,233 INFO L225 Difference]: With dead ends: 51 [2021-05-06 11:17:59,233 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 11:17:59,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 82052.7ms TimeCoverageRelationStatistics Valid=95, Invalid=489, Unknown=16, NotChecked=0, Total=600 [2021-05-06 11:17:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 11:17:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-05-06 11:17:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:17:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-06 11:17:59,242 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2021-05-06 11:17:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:17:59,242 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-06 11:17:59,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:17:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-06 11:17:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 11:17:59,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:17:59,243 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:17:59,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:17:59,243 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:17:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:17:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 9 times [2021-05-06 11:17:59,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:17:59,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348605275] [2021-05-06 11:17:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:18:00,209 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-06 11:18:01,335 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-06 11:18:01,361 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,361 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,362 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:18:01,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:18:01,398 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 7 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:18:01,400 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,401 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,401 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,402 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,402 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,402 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,403 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,403 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,404 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,404 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,405 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,405 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,406 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,406 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,407 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:18:01,407 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:18:01,425 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:18:01,450 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:18:01,463 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 9 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:18:01,464 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:18:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:18:01,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:18:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:18:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:18:01,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:07,611 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-06 11:18:07,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:09,650 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-06 11:18:09,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:17,741 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-06 11:18:17,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:19,785 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-06 11:18:19,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:27,887 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 11:18:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:29,939 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 79 [2021-05-06 11:18:29,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:38,060 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-05-06 11:18:38,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:40,130 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 101 [2021-05-06 11:18:40,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:48,294 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-05-06 11:18:48,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:50,388 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 123 [2021-05-06 11:18:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:18:58,599 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2021-05-06 11:18:58,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:00,697 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 130 [2021-05-06 11:19:00,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:08,875 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 152 DAG size of output: 150 [2021-05-06 11:19:08,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:10,991 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 152 [2021-05-06 11:19:10,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:19,193 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 169 DAG size of output: 167 [2021-05-06 11:19:19,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:21,332 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 164 [2021-05-06 11:19:21,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:29,557 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2021-05-06 11:19:29,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:31,720 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 190 [2021-05-06 11:19:31,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:31,725 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:31,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348605275] [2021-05-06 11:19:31,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348605275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:31,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:31,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 11:19:31,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578704050] [2021-05-06 11:19:31,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 11:19:31,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:31,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 11:19:31,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=450, Unknown=17, NotChecked=0, Total=552 [2021-05-06 11:19:31,726 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:38,019 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: ASSERTION VIOLATION File: ../src/math/lp/int_solver.cpp Line: 562 Failed to verify: get_freedom_interval_for_column(j, inf_l, l, inf_u, u, m) || settings().get_cancel_flag() Z3 4.8.11.0 Please file an issue with this message and more detail about how you encountered it at https://github.com/Z3Prover/z3/issues/new [2021-05-06 11:19:38,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:19:38,020 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:879) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:776) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 33 more [2021-05-06 11:19:38,022 INFO L168 Benchmark]: Toolchain (without parser) took 634192.85 ms. Allocated memory was 185.6 MB in the beginning and 240.1 MB in the end (delta: 54.5 MB). Free memory was 150.7 MB in the beginning and 90.6 MB in the end (delta: 60.1 MB). Peak memory consumption was 115.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,022 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:19:38,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.96 ms. Allocated memory is still 185.6 MB. Free memory was 150.6 MB in the beginning and 169.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,022 INFO L168 Benchmark]: Boogie Preprocessor took 38.90 ms. Allocated memory is still 185.6 MB. Free memory was 169.3 MB in the beginning and 167.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,022 INFO L168 Benchmark]: RCFGBuilder took 384.06 ms. Allocated memory is still 185.6 MB. Free memory was 167.7 MB in the beginning and 152.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,023 INFO L168 Benchmark]: TraceAbstraction took 633508.72 ms. Allocated memory was 185.6 MB in the beginning and 240.1 MB in the end (delta: 54.5 MB). Free memory was 152.0 MB in the beginning and 90.6 MB in the end (delta: 61.4 MB). Peak memory consumption was 116.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.96 ms. Allocated memory is still 185.6 MB. Free memory was 150.6 MB in the beginning and 169.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.90 ms. Allocated memory is still 185.6 MB. Free memory was 169.3 MB in the beginning and 167.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 384.06 ms. Allocated memory is still 185.6 MB. Free memory was 167.7 MB in the beginning and 152.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 633508.72 ms. Allocated memory was 185.6 MB in the beginning and 240.1 MB in the end (delta: 54.5 MB). Free memory was 152.0 MB in the beginning and 90.6 MB in the end (delta: 61.4 MB). Peak memory consumption was 116.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...