/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/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:19:32,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:19:32,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:19:32,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:19:32,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:19:32,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:19:32,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:19:32,098 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 11:19:32,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:19:32,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:19:32,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:19:32,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:19:32,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:19:32,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:19:32,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:19:32,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:19:32,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:19:32,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:19:32,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:19:32,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:19:32,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:19:32,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:19:32,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:19:32,113 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:19:32,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:19:32,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:19:32,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:19:32,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:19:32,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:19:32,384 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:19:32,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2021-05-06 11:19:32,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bf46614/22eeb033ac9e4f8c89c2dfbc5bf1a540/FLAGb8e343bb1 [2021-05-06 11:19:32,827 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:19:32,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2021-05-06 11:19:32,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bf46614/22eeb033ac9e4f8c89c2dfbc5bf1a540/FLAGb8e343bb1 [2021-05-06 11:19:33,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bf46614/22eeb033ac9e4f8c89c2dfbc5bf1a540 [2021-05-06 11:19:33,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:19:33,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:19:33,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:19:33,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:19:33,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:19:33,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264fa103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33, skipping insertion in model container [2021-05-06 11:19:33,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:19:33,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:19:33,305 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/sum04-1.i[808,821] [2021-05-06 11:19:33,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:19:33,327 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:19:33,335 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/sum04-1.i[808,821] [2021-05-06 11:19:33,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:19:33,344 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:19:33,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33 WrapperNode [2021-05-06 11:19:33,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:19:33,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:19:33,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:19:33,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:19:33,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (1/1) ... [2021-05-06 11:19:33,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:19:33,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:19:33,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:19:33,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:19:33,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (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 11:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:19:33,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:19:33,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:19:33,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:19:33,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:19:33,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:19:33,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:19:33,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:19:33,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:19:33,627 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:19:33,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:19:33 BoogieIcfgContainer [2021-05-06 11:19:33,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:19:33,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:19:33,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:19:33,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:19:33,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:19:33" (1/3) ... [2021-05-06 11:19:33,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b3f280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:19:33, skipping insertion in model container [2021-05-06 11:19:33,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:33" (2/3) ... [2021-05-06 11:19:33,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b3f280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:19:33, skipping insertion in model container [2021-05-06 11:19:33,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:19:33" (3/3) ... [2021-05-06 11:19:33,633 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2021-05-06 11:19:33,636 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:19:33,638 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:19:33,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:19:33,659 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:19:33,659 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:19:33,659 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:19:33,660 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:19:33,660 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:19:33,660 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:19:33,660 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:19:33,660 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:19:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:19:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:19:33,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:33,672 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:33,673 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2021-05-06 11:19:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:33,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258428565] [2021-05-06 11:19:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:33,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:19:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:33,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:33,806 INFO 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 11:19:33,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:33,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258428565] [2021-05-06 11:19:33,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258428565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:33,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:33,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:19:33,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902406659] [2021-05-06 11:19:33,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:19:33,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:19:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:19:33,820 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:33,899 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-06 11:19:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:19:33,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:19:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:33,921 INFO L225 Difference]: With dead ends: 31 [2021-05-06 11:19:33,922 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 11:19:33,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:19:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 11:19:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 11:19:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-06 11:19:33,972 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-06 11:19:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:33,972 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-06 11:19:33,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-06 11:19:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:19:33,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:33,973 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:33,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:19:33,974 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2021-05-06 11:19:33,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:33,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866058708] [2021-05-06 11:19:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:33,977 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:19:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:34,057 INFO 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 11:19:34,058 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866058708] [2021-05-06 11:19:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866058708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:34,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:34,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:19:34,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802405036] [2021-05-06 11:19:34,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:19:34,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:19:34,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:19:34,060 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:34,099 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-05-06 11:19:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:19:34,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:19:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:34,100 INFO L225 Difference]: With dead ends: 25 [2021-05-06 11:19:34,100 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:19:34,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:19:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:19:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-06 11:19:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-06 11:19:34,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-06 11:19:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:34,105 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-06 11:19:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-06 11:19:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:19:34,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:34,106 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:34,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:19:34,106 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2021-05-06 11:19:34,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:34,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101450400] [2021-05-06 11:19:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:34,143 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:34,146 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:34,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:34,179 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:34,192 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:34,195 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:19:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:34,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:34,243 INFO 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 11:19:34,289 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101450400] [2021-05-06 11:19:34,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101450400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:34,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:34,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:19:34,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679051639] [2021-05-06 11:19:34,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:19:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:19:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:19:34,292 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:34,413 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 11:19:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:19:34,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:19:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:34,414 INFO L225 Difference]: With dead ends: 26 [2021-05-06 11:19:34,415 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 11:19:34,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:19:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 11:19:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-05-06 11:19:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 11:19:34,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2021-05-06 11:19:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:34,426 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 11:19:34,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 11:19:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:19:34,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:34,427 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:34,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:19:34,427 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2046664786, now seen corresponding path program 1 times [2021-05-06 11:19:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:34,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004564038] [2021-05-06 11:19:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:34,451 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:34,473 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:34,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:34,492 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:34,504 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:34,506 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:19:34,513 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:34,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:34,526 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:34,540 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:34,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:34,563 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:34,575 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:34,588 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:34,592 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:34,601 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:34,620 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:34,632 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:34,635 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:34,744 INFO 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 11:19:34,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:34,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:34,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:34,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004564038] [2021-05-06 11:19:34,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004564038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:34,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:34,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:19:34,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244717790] [2021-05-06 11:19:34,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:19:34,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:19:34,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:19:34,811 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:34,967 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 11:19:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:19:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 11:19:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:34,968 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:19:34,968 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 11:19:34,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:19:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 11:19:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 11:19:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 11:19:34,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 11:19:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:34,973 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 11:19:34,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 11:19:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 11:19:34,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:34,974 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:34,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:19:34,974 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1412427221, now seen corresponding path program 2 times [2021-05-06 11:19:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:34,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101982080] [2021-05-06 11:19:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:34,982 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:34,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:34,996 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:35,002 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:35,013 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,014 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:19:35,017 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:35,018 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,021 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,029 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:35,031 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:35,044 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:35,054 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,059 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:35,068 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,072 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:35,079 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:35,089 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,090 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:35,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:35,128 INFO 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 11:19:35,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:35,153 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:35,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101982080] [2021-05-06 11:19:35,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101982080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:35,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:35,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:19:35,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817749666] [2021-05-06 11:19:35,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:19:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:19:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:19:35,154 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:35,227 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 11:19:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:19:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 11:19:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:35,228 INFO L225 Difference]: With dead ends: 37 [2021-05-06 11:19:35,228 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 11:19:35,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:19:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 11:19:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 11:19:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 11:19:35,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2021-05-06 11:19:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:35,232 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 11:19:35,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 11:19:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 11:19:35,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:35,233 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:35,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:19:35,233 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -402263410, now seen corresponding path program 3 times [2021-05-06 11:19:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320745148] [2021-05-06 11:19:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:35,240 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:35,249 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,253 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:35,260 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:35,270 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,271 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:19:35,274 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:35,275 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,277 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,302 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:35,304 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:35,318 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:35,329 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,334 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:35,335 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,340 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:35,355 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:35,365 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,366 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:35,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:35,422 INFO 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 11:19:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:35,478 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:35,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320745148] [2021-05-06 11:19:35,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320745148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:35,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:35,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:19:35,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844595560] [2021-05-06 11:19:35,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:19:35,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:19:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:19:35,479 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:35,608 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-05-06 11:19:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:19:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 11:19:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:35,609 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:19:35,609 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 11:19:35,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:19:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 11:19:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 11:19:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-06 11:19:35,613 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-05-06 11:19:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:35,613 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-06 11:19:35,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-06 11:19:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 11:19:35,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:35,614 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:35,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:19:35,614 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1841039991, now seen corresponding path program 4 times [2021-05-06 11:19:35,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:35,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898150639] [2021-05-06 11:19:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:35,621 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:35,622 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,627 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:35,641 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:35,650 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,654 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:35,654 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,656 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,663 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:35,665 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:35,677 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:35,686 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,687 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:35,690 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:35,699 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,702 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,709 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:35,711 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:35,717 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:35,726 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,730 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:35,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:35,735 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:35,748 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:35,757 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:35,775 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:35,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:35,809 INFO 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 11:19:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:35,855 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:35,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898150639] [2021-05-06 11:19:35,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898150639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:35,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:35,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:19:35,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652238607] [2021-05-06 11:19:35,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:19:35,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:19:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:19:35,856 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:36,005 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-05-06 11:19:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:19:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 11:19:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:36,006 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:19:36,006 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:19:36,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:19:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:19:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-06 11:19:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-06 11:19:36,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2021-05-06 11:19:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:36,011 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-06 11:19:36,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-06 11:19:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 11:19:36,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:36,011 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:36,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:19:36,012 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:36,012 INFO L82 PathProgramCache]: Analyzing trace with hash -660550482, now seen corresponding path program 5 times [2021-05-06 11:19:36,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:36,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707177082] [2021-05-06 11:19:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:36,018 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:36,027 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,031 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:36,037 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:36,046 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,049 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:36,050 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,051 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,058 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:36,060 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:36,072 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:36,081 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,082 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:36,084 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:36,085 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,086 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,094 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:36,095 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:36,107 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:36,116 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,120 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:36,128 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,132 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:36,138 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:36,147 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,149 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:36,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:36,193 INFO 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 11:19:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:36,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:36,340 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:36,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707177082] [2021-05-06 11:19:36,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707177082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:36,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:36,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 11:19:36,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281436370] [2021-05-06 11:19:36,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 11:19:36,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 11:19:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:19:36,342 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:36,680 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-06 11:19:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:19:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 11:19:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:36,681 INFO L225 Difference]: With dead ends: 43 [2021-05-06 11:19:36,681 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 11:19:36,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:19:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 11:19:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 11:19:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-06 11:19:36,685 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-05-06 11:19:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:36,685 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-06 11:19:36,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-06 11:19:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 11:19:36,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:36,686 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:36,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 11:19:36,686 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:36,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:36,687 INFO L82 PathProgramCache]: Analyzing trace with hash 110192489, now seen corresponding path program 6 times [2021-05-06 11:19:36,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:36,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516730549] [2021-05-06 11:19:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:36,693 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:36,701 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,705 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:36,711 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:36,720 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,723 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:36,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,733 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,740 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:36,741 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:36,747 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:36,756 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,757 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:36,759 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:36,767 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,769 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,775 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:36,777 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:36,782 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:36,792 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,795 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:36,796 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:36,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:36,813 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:36,822 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:36,824 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:36,855 INFO 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 11:19:36,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:36,907 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516730549] [2021-05-06 11:19:36,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516730549] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:36,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:36,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:19:36,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561701244] [2021-05-06 11:19:36,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:19:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:36,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:19:36,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:19:36,909 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:37,142 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-06 11:19:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:19:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 11:19:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:37,143 INFO L225 Difference]: With dead ends: 46 [2021-05-06 11:19:37,143 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 11:19:37,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:19:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 11:19:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 11:19:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-06 11:19:37,149 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-05-06 11:19:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:37,149 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-06 11:19:37,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-06 11:19:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 11:19:37,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:37,150 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:37,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:19:37,150 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:37,150 INFO L82 PathProgramCache]: Analyzing trace with hash 418877134, now seen corresponding path program 7 times [2021-05-06 11:19:37,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:37,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013955477] [2021-05-06 11:19:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:37,157 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size [2021-05-06 11:19:37,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:37,170 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:37,177 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 75.4 percent of original size 52 [2021-05-06 11:19:37,187 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:37,190 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:37,191 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:37,192 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:37,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:37,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:37,214 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:37,224 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:37,225 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:37,227 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-06 11:19:37,236 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:37,238 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:37,244 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:19:37,246 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:19:37,252 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-06 11:19:37,261 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:37,264 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size [2021-05-06 11:19:37,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:19:37,276 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:19:37,282 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-05-06 11:19:37,291 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:19:37,292 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:19:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:37,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:19:37,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:37,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:19:37,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:37,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013955477] [2021-05-06 11:19:37,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013955477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:37,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:37,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:19:37,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040940769] [2021-05-06 11:19:37,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:19:37,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:37,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:19:37,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:19:37,491 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:37,891 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-06 11:19:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:19:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 11:19:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:37,891 INFO L225 Difference]: With dead ends: 39 [2021-05-06 11:19:37,891 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:19:37,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:19:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:19:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:19:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 11:19:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:19:37,892 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-05-06 11:19:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:37,892 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:19:37,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:19:37,893 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:19:37,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 11:19:37,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:19:38,083 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2021-05-06 11:19:38,224 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-05-06 11:19:38,356 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-05-06 11:19:38,359 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-06 11:19:38,359 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-06 11:19:38,359 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-06 11:19:38,359 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:19:38,359 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 29) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L194 CegarLoopUtils]: At program point L25(lines 25 26) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 8) .cse0) (and (= main_~i~0 4) .cse0) (and (= 7 main_~i~0) .cse0) (and (= main_~sn~0 4) (= main_~i~0 3)) (and (= main_~i~0 2) (= 2 main_~sn~0)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0))) [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 22 29) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L194 CegarLoopUtils]: At program point L24-2(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (< main_~i~0 5) (<= 4 main_~i~0) .cse0) (and (= 7 main_~i~0) .cse0) (and (= main_~i~0 1) (= 2 main_~sn~0)) (and .cse0 (= main_~i~0 3)) (and (= main_~sn~0 4) (= main_~i~0 2)) (and (<= 8 main_~i~0) (< main_~i~0 9) .cse0) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0))) [2021-05-06 11:19:38,360 INFO L194 CegarLoopUtils]: At program point L24-3(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 8) .cse0) (and (= main_~i~0 4) .cse0) (and (= 7 main_~i~0) .cse0) (and (= main_~sn~0 4) (= main_~i~0 3)) (and (= main_~i~0 2) (= 2 main_~sn~0)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0) (and (<= 9 main_~i~0) (< main_~i~0 10) .cse0))) [2021-05-06 11:19:38,360 INFO L194 CegarLoopUtils]: At program point L24-4(lines 24 27) the Hoare annotation is: false [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 22 29) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: true [2021-05-06 11:19:38,360 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-05-06 11:19:38,361 INFO L201 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-05-06 11:19:38,361 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2021-05-06 11:19:38,361 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: true [2021-05-06 11:19:38,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:19:38 BoogieIcfgContainer [2021-05-06 11:19:38,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:19:38,370 INFO L168 Benchmark]: Toolchain (without parser) took 5160.29 ms. Allocated memory was 170.9 MB in the beginning and 253.8 MB in the end (delta: 82.8 MB). Free memory was 135.9 MB in the beginning and 162.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 130.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,371 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 170.9 MB. Free memory is still 152.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:19:38,371 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.27 ms. Allocated memory is still 170.9 MB. Free memory was 135.7 MB in the beginning and 126.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,371 INFO L168 Benchmark]: Boogie Preprocessor took 55.65 ms. Allocated memory is still 170.9 MB. Free memory was 126.2 MB in the beginning and 154.8 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,371 INFO L168 Benchmark]: RCFGBuilder took 226.88 ms. Allocated memory is still 170.9 MB. Free memory was 154.4 MB in the beginning and 140.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,371 INFO L168 Benchmark]: TraceAbstraction took 4740.81 ms. Allocated memory was 170.9 MB in the beginning and 253.8 MB in the end (delta: 82.8 MB). Free memory was 140.2 MB in the beginning and 162.9 MB in the end (delta: -22.6 MB). Peak memory consumption was 134.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:38,371 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 170.9 MB. Free memory is still 152.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 130.27 ms. Allocated memory is still 170.9 MB. Free memory was 135.7 MB in the beginning and 126.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.65 ms. Allocated memory is still 170.9 MB. Free memory was 126.2 MB in the beginning and 154.8 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 226.88 ms. Allocated memory is still 170.9 MB. Free memory was 154.4 MB in the beginning and 140.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4740.81 ms. Allocated memory was 170.9 MB in the beginning and 253.8 MB in the end (delta: 82.8 MB). Free memory was 140.2 MB in the beginning and 162.9 MB in the end (delta: -22.6 MB). Peak memory consumption was 134.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4235.1ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 10.4ms, AutomataDifference: 1766.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 465.7ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 106 SDtfs, 191 SDslu, 285 SDs, 0 SdLazy, 1398 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 507.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 265 GetRequests, 110 SyntacticMatches, 14 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1574.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 74 PreInvPairs, 121 NumberOfFragments, 228 HoareAnnotationTreeSize, 74 FomulaSimplifications, 14510 FormulaSimplificationTreeSizeReduction, 72.5ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 913 FormulaSimplificationTreeSizeReductionInter, 385.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((i == 8 && 6 == sn) || (i == 4 && 6 == sn)) || (7 == i && 6 == sn)) || (sn == 4 && i == 3)) || (i == 2 && 2 == sn)) || (sn == 0 && i == 1)) || (5 == i && 6 == sn)) || (i == 6 && 6 == sn)) || ((9 <= i && i < 10) && 6 == sn) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...