/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:02:54,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:02:54,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:02:55,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 19:02:55,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:02:55,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:02:55,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:02:55,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:02:55,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:02:55,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:02:55,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:02:55,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:02:55,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:02:55,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:02:55,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:02:55,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:02:55,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:02:55,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:02:55,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:02:55,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:02:55,150 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:02:55,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:02:55,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:02:55,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:02:55,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:02:55,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:02:55,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:02:55,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:02:55,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:02:55,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:02:55,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:02:55,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:02:55,537 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:02:55,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2021-02-23 19:02:55,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdeb95916/6c5b705a730c4995ad3d00cffe7bebbb/FLAGb6e30206a [2021-02-23 19:02:56,292 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:02:56,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2021-02-23 19:02:56,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdeb95916/6c5b705a730c4995ad3d00cffe7bebbb/FLAGb6e30206a [2021-02-23 19:02:56,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdeb95916/6c5b705a730c4995ad3d00cffe7bebbb [2021-02-23 19:02:56,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:02:56,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:02:56,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:02:56,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:02:56,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:02:56,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:56,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586de8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56, skipping insertion in model container [2021-02-23 19:02:56,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:56,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:02:56,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:02:56,876 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c[321,334] [2021-02-23 19:02:56,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:02:56,906 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:02:56,923 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c[321,334] [2021-02-23 19:02:56,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:02:56,971 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:02:56,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56 WrapperNode [2021-02-23 19:02:56,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:02:56,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:02:56,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:02:56,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:02:56,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:56,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:57,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:57,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:57,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:57,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:57,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (1/1) ... [2021-02-23 19:02:57,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:02:57,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:02:57,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:02:57,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:02:57,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (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 [2021-02-23 19:02:57,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:02:57,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:02:57,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:02:57,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:02:57,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:02:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:02:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:02:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:02:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:02:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:02:57,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:02:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:02:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:02:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:02:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:02:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:02:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:02:57,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:02:57,712 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-23 19:02:57,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:02:57 BoogieIcfgContainer [2021-02-23 19:02:57,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:02:57,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:02:57,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:02:57,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:02:57,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:02:56" (1/3) ... [2021-02-23 19:02:57,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1500c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:02:57, skipping insertion in model container [2021-02-23 19:02:57,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:56" (2/3) ... [2021-02-23 19:02:57,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1500c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:02:57, skipping insertion in model container [2021-02-23 19:02:57,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:02:57" (3/3) ... [2021-02-23 19:02:57,766 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2021-02-23 19:02:57,781 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:02:57,804 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:02:57,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:02:57,853 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:02:57,853 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:02:57,854 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:02:57,854 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:02:57,854 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:02:57,854 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:02:57,855 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:02:57,855 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:02:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-23 19:02:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 19:02:57,884 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:57,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:57,886 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2146802473, now seen corresponding path program 1 times [2021-02-23 19:02:57,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:57,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80072018] [2021-02-23 19:02:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:57,989 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:02:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:58,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:58,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:58,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:02:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:58,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:02:58,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80072018] [2021-02-23 19:02:58,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:02:58,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 19:02:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662430925] [2021-02-23 19:02:58,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 19:02:58,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:02:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 19:02:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:02:58,323 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2021-02-23 19:02:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:02:58,454 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2021-02-23 19:02:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 19:02:58,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-02-23 19:02:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:02:58,467 INFO L225 Difference]: With dead ends: 91 [2021-02-23 19:02:58,467 INFO L226 Difference]: Without dead ends: 49 [2021-02-23 19:02:58,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:02:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-23 19:02:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-02-23 19:02:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-23 19:02:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-02-23 19:02:58,534 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 31 [2021-02-23 19:02:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:02:58,535 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-02-23 19:02:58,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 19:02:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-02-23 19:02:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 19:02:58,537 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:58,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:58,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:02:58,538 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2140776655, now seen corresponding path program 1 times [2021-02-23 19:02:58,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:58,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369156437] [2021-02-23 19:02:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:58,543 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:02:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:58,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:58,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:02:58,689 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-23 19:02:58,694 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 38 [2021-02-23 19:02:58,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:02:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:58,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:58,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:02:58,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369156437] [2021-02-23 19:02:58,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:02:58,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:02:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135060193] [2021-02-23 19:02:58,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:02:58,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:02:58,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:02:58,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:02:58,838 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 4 states. [2021-02-23 19:02:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:02:59,134 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-02-23 19:02:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:02:59,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-23 19:02:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:02:59,137 INFO L225 Difference]: With dead ends: 100 [2021-02-23 19:02:59,137 INFO L226 Difference]: Without dead ends: 69 [2021-02-23 19:02:59,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:02:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-23 19:02:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2021-02-23 19:02:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 19:02:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-02-23 19:02:59,159 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2021-02-23 19:02:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:02:59,160 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-02-23 19:02:59,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:02:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-02-23 19:02:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 19:02:59,162 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:59,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:59,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:02:59,163 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash 619271948, now seen corresponding path program 1 times [2021-02-23 19:02:59,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:59,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727104954] [2021-02-23 19:02:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:59,756 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:02:59,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:59,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-23 19:03:00,131 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:00,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:00,465 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-23 19:03:00,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:00,485 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:00,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:00,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:00,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:00,745 WARN L141 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-02-23 19:03:00,746 WARN L147 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size 7 [2021-02-23 19:03:00,761 WARN L141 QuantifierPusher]: treesize reduction 32, result has 79.1 percent of original size [2021-02-23 19:03:00,767 WARN L147 QuantifierPusher]: treesize reduction 32, result has 79.1 percent of original size 121 [2021-02-23 19:03:00,831 WARN L141 QuantifierPusher]: treesize reduction 62, result has 34.0 percent of original size [2021-02-23 19:03:00,834 WARN L147 QuantifierPusher]: treesize reduction 62, result has 34.0 percent of original size 32 [2021-02-23 19:03:00,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:00,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:00,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:00,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:00,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:00,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:00,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:01,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-23 19:03:01,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:01,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-23 19:03:01,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:01,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:01,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:01,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:01,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:01,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:01,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:01,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:01,088 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 19:03:01,090 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 19:03:01,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727104954] [2021-02-23 19:03:01,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:01,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:03:01,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351973710] [2021-02-23 19:03:01,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:03:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:01,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:03:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:03:01,095 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2021-02-23 19:03:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:01,634 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-02-23 19:03:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 19:03:01,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2021-02-23 19:03:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:01,640 INFO L225 Difference]: With dead ends: 105 [2021-02-23 19:03:01,641 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 19:03:01,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:03:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 19:03:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2021-02-23 19:03:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-23 19:03:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-02-23 19:03:01,691 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2021-02-23 19:03:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:01,691 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-02-23 19:03:01,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:03:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-02-23 19:03:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 19:03:01,695 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:01,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:01,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:03:01,695 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:01,696 INFO L82 PathProgramCache]: Analyzing trace with hash 571317961, now seen corresponding path program 2 times [2021-02-23 19:03:01,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:01,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564704725] [2021-02-23 19:03:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:02,202 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:02,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:02,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:02,560 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:02,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:02,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-23 19:03:02,885 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-23 19:03:02,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:02,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:02,900 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:03,088 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:03,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 19:03:03,290 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:03,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-23 19:03:03,475 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-23 19:03:03,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-23 19:03:03,479 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:03,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:03,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:03,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:03,586 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-23 19:03:03,586 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-23 19:03:03,597 WARN L141 QuantifierPusher]: treesize reduction 6, result has 92.6 percent of original size [2021-02-23 19:03:03,602 WARN L147 QuantifierPusher]: treesize reduction 6, result has 92.6 percent of original size 75 [2021-02-23 19:03:03,640 WARN L141 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size [2021-02-23 19:03:03,642 WARN L147 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size 41 [2021-02-23 19:03:03,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:03,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:03,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:03,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:03,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:03,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-23 19:03:03,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-23 19:03:03,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:03,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:03,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:03,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:03,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:03,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:03,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:03,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:03,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:03,875 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 19:03:03,875 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 19:03:03,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564704725] [2021-02-23 19:03:03,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:03,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 19:03:03,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787620555] [2021-02-23 19:03:03,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 19:03:03,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 19:03:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-02-23 19:03:03,878 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 13 states. [2021-02-23 19:03:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:04,548 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2021-02-23 19:03:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 19:03:04,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2021-02-23 19:03:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:04,557 INFO L225 Difference]: With dead ends: 113 [2021-02-23 19:03:04,558 INFO L226 Difference]: Without dead ends: 77 [2021-02-23 19:03:04,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-02-23 19:03:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-23 19:03:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-02-23 19:03:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-23 19:03:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-02-23 19:03:04,589 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 39 [2021-02-23 19:03:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:04,596 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-02-23 19:03:04,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 19:03:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-02-23 19:03:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 19:03:04,599 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:04,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:04,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:03:04,600 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -534921210, now seen corresponding path program 3 times [2021-02-23 19:03:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:04,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888972110] [2021-02-23 19:03:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:05,092 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:05,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:05,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-23 19:03:05,415 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-23 19:03:05,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:05,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:05,747 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:05,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:05,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:05,769 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:05,939 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:05,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:05,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 19:03:06,101 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-23 19:03:06,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-23 19:03:06,297 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:06,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-23 19:03:06,302 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:06,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:06,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:06,375 WARN L141 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-02-23 19:03:06,376 WARN L147 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size 7 [2021-02-23 19:03:06,379 WARN L141 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size [2021-02-23 19:03:06,380 WARN L147 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size 23 [2021-02-23 19:03:06,418 WARN L141 QuantifierPusher]: treesize reduction 3, result has 96.5 percent of original size [2021-02-23 19:03:06,420 WARN L147 QuantifierPusher]: treesize reduction 3, result has 96.5 percent of original size 82 [2021-02-23 19:03:06,465 WARN L141 QuantifierPusher]: treesize reduction 31, result has 64.0 percent of original size [2021-02-23 19:03:06,467 WARN L147 QuantifierPusher]: treesize reduction 31, result has 64.0 percent of original size 55 [2021-02-23 19:03:06,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:06,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:06,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:06,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:06,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-23 19:03:06,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:03:06,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-02-23 19:03:06,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 19:03:06,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:06,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:06,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:06,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:06,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:06,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:06,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:06,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:06,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:06,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:06,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:06,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:06,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:06,828 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 19:03:06,828 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 19:03:06,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888972110] [2021-02-23 19:03:06,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:06,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 19:03:06,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162825604] [2021-02-23 19:03:06,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 19:03:06,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 19:03:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-23 19:03:06,830 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 16 states. [2021-02-23 19:03:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:07,752 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-02-23 19:03:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 19:03:07,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2021-02-23 19:03:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:07,754 INFO L225 Difference]: With dead ends: 121 [2021-02-23 19:03:07,754 INFO L226 Difference]: Without dead ends: 81 [2021-02-23 19:03:07,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-02-23 19:03:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-23 19:03:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2021-02-23 19:03:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 19:03:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-02-23 19:03:07,772 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 43 [2021-02-23 19:03:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:07,772 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-02-23 19:03:07,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 19:03:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-02-23 19:03:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 19:03:07,774 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:07,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:07,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:03:07,774 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash -359597373, now seen corresponding path program 4 times [2021-02-23 19:03:07,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:07,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159516259] [2021-02-23 19:03:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:08,296 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:08,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:08,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-23 19:03:08,659 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:08,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:08,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:08,986 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-23 19:03:08,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:08,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:08,994 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:09,184 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:09,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 19:03:09,359 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:09,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-23 19:03:09,527 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-23 19:03:09,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-23 19:03:09,531 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:09,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:09,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:09,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:09,598 WARN L141 QuantifierPusher]: treesize reduction 19, result has 26.9 percent of original size [2021-02-23 19:03:09,599 WARN L147 QuantifierPusher]: treesize reduction 19, result has 26.9 percent of original size 7 [2021-02-23 19:03:09,604 WARN L141 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size [2021-02-23 19:03:09,605 WARN L147 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size 52 [2021-02-23 19:03:09,638 WARN L141 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size [2021-02-23 19:03:09,640 WARN L147 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size 41 [2021-02-23 19:03:09,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:09,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:09,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:09,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:09,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-23 19:03:09,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-23 19:03:09,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:09,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:09,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:09,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:09,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:09,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:09,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:09,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:09,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:09,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:09,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:09,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:09,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:09,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:09,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:10,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:10,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:10,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:10,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:10,066 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 19:03:10,067 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 19:03:10,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159516259] [2021-02-23 19:03:10,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:10,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 19:03:10,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802050133] [2021-02-23 19:03:10,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 19:03:10,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:10,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 19:03:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:03:10,070 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 19 states. [2021-02-23 19:03:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:11,229 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-02-23 19:03:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 19:03:11,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2021-02-23 19:03:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:11,230 INFO L225 Difference]: With dead ends: 129 [2021-02-23 19:03:11,231 INFO L226 Difference]: Without dead ends: 85 [2021-02-23 19:03:11,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 19:03:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-23 19:03:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2021-02-23 19:03:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-23 19:03:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-02-23 19:03:11,247 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 47 [2021-02-23 19:03:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:11,248 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-02-23 19:03:11,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 19:03:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-02-23 19:03:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 19:03:11,249 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:11,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:11,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:03:11,250 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:11,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1086419200, now seen corresponding path program 5 times [2021-02-23 19:03:11,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:11,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359473526] [2021-02-23 19:03:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:11,752 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-23 19:03:11,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:11,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:12,088 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:12,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:12,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-23 19:03:12,443 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-23 19:03:12,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:12,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-23 19:03:12,461 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:12,650 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:12,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:12,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 19:03:12,853 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-23 19:03:12,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:12,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-23 19:03:13,024 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-23 19:03:13,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-23 19:03:13,028 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:03:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:13,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:13,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:13,120 WARN L141 QuantifierPusher]: treesize reduction 35, result has 48.5 percent of original size [2021-02-23 19:03:13,121 WARN L147 QuantifierPusher]: treesize reduction 35, result has 48.5 percent of original size 33 [2021-02-23 19:03:13,170 WARN L141 QuantifierPusher]: treesize reduction 28, result has 54.8 percent of original size [2021-02-23 19:03:13,173 WARN L147 QuantifierPusher]: treesize reduction 28, result has 54.8 percent of original size 34 [2021-02-23 19:03:13,181 WARN L141 QuantifierPusher]: treesize reduction 3, result has 95.7 percent of original size [2021-02-23 19:03:13,183 WARN L147 QuantifierPusher]: treesize reduction 3, result has 95.7 percent of original size 66 [2021-02-23 19:03:13,233 WARN L141 QuantifierPusher]: treesize reduction 24, result has 44.2 percent of original size [2021-02-23 19:03:13,234 WARN L147 QuantifierPusher]: treesize reduction 24, result has 44.2 percent of original size 19 [2021-02-23 19:03:13,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:13,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:13,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:13,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:13,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-23 19:03:13,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:03:13,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-02-23 19:03:13,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 19:03:13,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 19:03:13,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:13,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:13,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:13,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 19:03:13,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:03:13,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 19:03:13,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 19:03:13,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:13,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:03:13,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 19:03:13,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 19:03:13,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:13,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:03:13,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 19:03:13,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 19:03:13,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:13,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:14,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:14,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:03:14,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:14,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 19:03:14,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:14,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 19:03:14,189 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 19:03:14,190 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 19:03:14,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359473526] [2021-02-23 19:03:14,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:14,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-02-23 19:03:14,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592683742] [2021-02-23 19:03:14,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-23 19:03:14,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:14,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-23 19:03:14,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-02-23 19:03:14,193 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 27 states. [2021-02-23 19:03:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:16,015 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-02-23 19:03:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 19:03:16,016 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2021-02-23 19:03:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:16,016 INFO L225 Difference]: With dead ends: 85 [2021-02-23 19:03:16,016 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 19:03:16,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=577, Invalid=2285, Unknown=0, NotChecked=0, Total=2862 [2021-02-23 19:03:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 19:03:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 19:03:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 19:03:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 19:03:16,019 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-02-23 19:03:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:16,020 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 19:03:16,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-23 19:03:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 19:03:16,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 19:03:16,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:03:16,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 19:03:17,369 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 12 [2021-02-23 19:03:17,526 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 10 [2021-02-23 19:03:18,617 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 19:03:18,618 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 19:03:18,618 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 19:03:18,618 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 19:03:18,618 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 27) the Hoare annotation is: true [2021-02-23 19:03:18,619 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,619 INFO L185 CegarLoopUtils]: At program point L23-3(line 23) the Hoare annotation is: (and (<= 0 main_~v~0) (<= main_~v~0 9)) [2021-02-23 19:03:18,619 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= main_~v~0 0) [2021-02-23 19:03:18,619 INFO L185 CegarLoopUtils]: At program point L23-4(line 23) the Hoare annotation is: (and (<= 0 main_~v~0) (= main_~v~0 |main_#t~post11|) (<= main_~v~0 9)) [2021-02-23 19:03:18,620 INFO L185 CegarLoopUtils]: At program point L23-5(line 23) the Hoare annotation is: (and (= main_~v~0 (+ |main_#t~post11| 1)) (<= 0 |main_#t~post11|) (<= |main_#t~post11| 9)) [2021-02-23 19:03:18,620 INFO L185 CegarLoopUtils]: At program point L23-6(line 23) the Hoare annotation is: (or (and (<= 1 main_~v~0) (<= main_~v~0 10)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,620 INFO L185 CegarLoopUtils]: At program point L23-7(line 23) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-23 19:03:18,620 INFO L185 CegarLoopUtils]: At program point L19-3(lines 19 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,620 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-23 19:03:18,620 INFO L185 CegarLoopUtils]: At program point L19-4(line 19) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,620 INFO L185 CegarLoopUtils]: At program point L19-5(line 19) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,621 INFO L185 CegarLoopUtils]: At program point L19-6(lines 19 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,621 INFO L192 CegarLoopUtils]: At program point L19-7(lines 19 25) the Hoare annotation is: true [2021-02-23 19:03:18,621 INFO L185 CegarLoopUtils]: At program point L24(lines 22 25) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-23 19:03:18,621 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,621 INFO L185 CegarLoopUtils]: At program point L20-3(lines 20 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,621 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 19:03:18,621 INFO L185 CegarLoopUtils]: At program point L20-4(line 20) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,621 INFO L185 CegarLoopUtils]: At program point L20-5(line 20) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L185 CegarLoopUtils]: At program point L20-6(lines 20 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L185 CegarLoopUtils]: At program point L21-3(lines 21 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-23 19:03:18,622 INFO L185 CegarLoopUtils]: At program point L21-4(line 21) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L185 CegarLoopUtils]: At program point L21-5(line 21) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L185 CegarLoopUtils]: At program point L21-6(lines 21 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,622 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 27) the Hoare annotation is: true [2021-02-23 19:03:18,622 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2021-02-23 19:03:18,623 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,623 INFO L185 CegarLoopUtils]: At program point L22-3(line 22) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-23 19:03:18,623 INFO L192 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: true [2021-02-23 19:03:18,623 INFO L185 CegarLoopUtils]: At program point L22-4(line 22) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-23 19:03:18,623 INFO L185 CegarLoopUtils]: At program point L22-5(lines 22 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-23 19:03:18,623 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-23 19:03:18,623 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2021-02-23 19:03:18,623 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2021-02-23 19:03:18,624 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2021-02-23 19:03:18,624 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2021-02-23 19:03:18,624 INFO L185 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2021-02-23 19:03:18,624 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2021-02-23 19:03:18,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:03:18 BoogieIcfgContainer [2021-02-23 19:03:18,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:03:18,646 INFO L168 Benchmark]: Toolchain (without parser) took 21981.71 ms. Allocated memory was 165.7 MB in the beginning and 351.3 MB in the end (delta: 185.6 MB). Free memory was 142.9 MB in the beginning and 252.8 MB in the end (delta: -109.9 MB). Peak memory consumption was 206.1 MB. Max. memory is 8.0 GB. [2021-02-23 19:03:18,646 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 165.7 MB. Free memory was 138.0 MB in the beginning and 137.8 MB in the end (delta: 215.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:03:18,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.76 ms. Allocated memory is still 165.7 MB. Free memory was 141.6 MB in the beginning and 131.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:03:18,647 INFO L168 Benchmark]: Boogie Preprocessor took 76.28 ms. Allocated memory is still 165.7 MB. Free memory was 131.9 MB in the beginning and 130.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 19:03:18,647 INFO L168 Benchmark]: RCFGBuilder took 663.00 ms. Allocated memory is still 165.7 MB. Free memory was 130.3 MB in the beginning and 113.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:03:18,647 INFO L168 Benchmark]: TraceAbstraction took 20927.59 ms. Allocated memory was 165.7 MB in the beginning and 351.3 MB in the end (delta: 185.6 MB). Free memory was 113.1 MB in the beginning and 252.8 MB in the end (delta: -139.7 MB). Peak memory consumption was 176.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:03:18,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 165.7 MB. Free memory was 138.0 MB in the beginning and 137.8 MB in the end (delta: 215.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.76 ms. Allocated memory is still 165.7 MB. Free memory was 141.6 MB in the beginning and 131.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.28 ms. Allocated memory is still 165.7 MB. Free memory was 131.9 MB in the beginning and 130.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 663.00 ms. Allocated memory is still 165.7 MB. Free memory was 130.3 MB in the beginning and 113.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20927.59 ms. Allocated memory was 165.7 MB in the beginning and 351.3 MB in the end (delta: 185.6 MB). Free memory was 113.1 MB in the beginning and 252.8 MB in the end (delta: -139.7 MB). Peak memory consumption was 176.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (1 <= v && v <= 10) || (0 <= v && v <= 9) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (cond + 2 <= 0 || (!(2 <= \old(cond)) && !(\old(cond) + 2 <= 0))) || 2 <= cond - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.1s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 381 SDtfs, 783 SDslu, 537 SDs, 0 SdLazy, 2346 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 37 SyntacticMatches, 20 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 95 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 55 LocationsWithAnnotation, 97 PreInvPairs, 165 NumberOfFragments, 665 HoareAnnotationTreeSize, 97 FomulaSimplifications, 81180 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 55 FomulaSimplificationsInter, 2630 FormulaSimplificationTreeSizeReductionInter, 1.8s 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...