/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/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:41:50,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:41:50,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:41:50,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:41:50,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:41:50,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:41:50,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:41:50,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:41:50,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:41:50,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:41:50,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:41:50,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:41:50,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:41:50,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:41:50,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:41:50,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:41:50,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:41:50,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:41:50,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:41:50,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:41:50,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:41:50,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:41:50,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:41:50,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:41:50,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:41:50,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:41:50,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:41:50,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:41:50,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:41:50,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:41:50,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:41:50,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:41:50,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:41:50,622 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:41:50,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:41:50,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:41:50,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:41:50,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:41:50,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:41:50,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:41:50,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:41:51,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:41:51,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:41:51,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:41:51,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:41:51,118 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:41:51,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-11-07 00:41:51,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d801e147/2ba3b7e5e9d64727ab2ab3dfe3aab00e/FLAGd89746a37 [2020-11-07 00:41:51,938 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:41:51,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-11-07 00:41:51,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d801e147/2ba3b7e5e9d64727ab2ab3dfe3aab00e/FLAGd89746a37 [2020-11-07 00:41:52,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d801e147/2ba3b7e5e9d64727ab2ab3dfe3aab00e [2020-11-07 00:41:52,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:41:52,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:41:52,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:52,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:41:52,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:41:52,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6507d4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52, skipping insertion in model container [2020-11-07 00:41:52,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:41:52,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:41:52,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:52,533 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:41:52,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:52,572 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:41:52,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52 WrapperNode [2020-11-07 00:41:52,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:52,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:41:52,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:41:52,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:41:52,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (1/1) ... [2020-11-07 00:41:52,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:41:52,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:41:52,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:41:52,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:41:52,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (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 [2020-11-07 00:41:52,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:41:52,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:41:52,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:41:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-07 00:41:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:41:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:41:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:41:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:41:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:41:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:41:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-07 00:41:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:41:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:41:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:41:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:41:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:41:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:41:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:41:53,160 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:41:53,160 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:41:53,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:53 BoogieIcfgContainer [2020-11-07 00:41:53,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:41:53,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:41:53,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:41:53,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:41:53,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:52" (1/3) ... [2020-11-07 00:41:53,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f22734a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:53, skipping insertion in model container [2020-11-07 00:41:53,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:52" (2/3) ... [2020-11-07 00:41:53,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f22734a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:53, skipping insertion in model container [2020-11-07 00:41:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:53" (3/3) ... [2020-11-07 00:41:53,211 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-11-07 00:41:53,253 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:41:53,264 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:41:53,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:41:53,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:41:53,323 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:41:53,324 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:41:53,324 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:41:53,324 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:41:53,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:41:53,324 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:41:53,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:41:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 00:41:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 00:41:53,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:53,363 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] [2020-11-07 00:41:53,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1785484606, now seen corresponding path program 1 times [2020-11-07 00:41:53,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:53,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104887934] [2020-11-07 00:41:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:53,491 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:41:53,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104887934] [2020-11-07 00:41:53,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:53,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227050520] [2020-11-07 00:41:53,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:53,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:53,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:53,877 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2020-11-07 00:41:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:54,254 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-07 00:41:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:54,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-07 00:41:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:54,267 INFO L225 Difference]: With dead ends: 57 [2020-11-07 00:41:54,267 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 00:41:54,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 00:41:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 00:41:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 00:41:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 00:41:54,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2020-11-07 00:41:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:54,337 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 00:41:54,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 00:41:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 00:41:54,339 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:54,340 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-07 00:41:54,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:41:54,340 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1068328173, now seen corresponding path program 1 times [2020-11-07 00:41:54,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:54,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450617291] [2020-11-07 00:41:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:54,346 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:54,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:54,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:54,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450617291] [2020-11-07 00:41:54,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:54,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:54,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132862299] [2020-11-07 00:41:54,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:54,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:54,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:54,555 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2020-11-07 00:41:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:54,827 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-11-07 00:41:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:54,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-11-07 00:41:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:54,830 INFO L225 Difference]: With dead ends: 59 [2020-11-07 00:41:54,830 INFO L226 Difference]: Without dead ends: 44 [2020-11-07 00:41:54,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-07 00:41:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-07 00:41:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-07 00:41:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-07 00:41:54,848 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-11-07 00:41:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:54,849 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-07 00:41:54,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-07 00:41:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 00:41:54,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:54,851 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-07 00:41:54,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:41:54,852 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash -781296813, now seen corresponding path program 1 times [2020-11-07 00:41:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951727267] [2020-11-07 00:41:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:54,856 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:54,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:55,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951727267] [2020-11-07 00:41:55,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:55,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:41:55,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258637852] [2020-11-07 00:41:55,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:41:55,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:41:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:41:55,057 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-11-07 00:41:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:55,500 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-11-07 00:41:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:41:55,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-11-07 00:41:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:55,502 INFO L225 Difference]: With dead ends: 51 [2020-11-07 00:41:55,502 INFO L226 Difference]: Without dead ends: 44 [2020-11-07 00:41:55,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:41:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-07 00:41:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-07 00:41:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 00:41:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-07 00:41:55,517 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-11-07 00:41:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:55,518 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-07 00:41:55,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:41:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-07 00:41:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:41:55,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:55,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:55,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:41:55,520 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1351088482, now seen corresponding path program 1 times [2020-11-07 00:41:55,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:55,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488633892] [2020-11-07 00:41:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:55,525 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:41:55,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488633892] [2020-11-07 00:41:55,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:55,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:55,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764533553] [2020-11-07 00:41:55,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:55,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:55,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:55,644 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 6 states. [2020-11-07 00:41:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:55,908 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-11-07 00:41:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:55,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-11-07 00:41:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:55,917 INFO L225 Difference]: With dead ends: 53 [2020-11-07 00:41:55,917 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 00:41:55,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 00:41:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-07 00:41:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 00:41:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-07 00:41:55,948 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 47 [2020-11-07 00:41:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:55,949 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-07 00:41:55,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-07 00:41:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:41:55,951 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:55,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:55,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:41:55,956 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:55,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1638119842, now seen corresponding path program 2 times [2020-11-07 00:41:55,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:55,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79825193] [2020-11-07 00:41:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:55,961 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:56,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:56,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:56,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:56,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:41:56,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79825193] [2020-11-07 00:41:56,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:56,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:41:56,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458496411] [2020-11-07 00:41:56,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:41:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:41:56,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:41:56,240 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-11-07 00:41:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:57,035 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-07 00:41:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:41:57,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-11-07 00:41:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:57,038 INFO L225 Difference]: With dead ends: 74 [2020-11-07 00:41:57,038 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 00:41:57,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:41:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 00:41:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-11-07 00:41:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 00:41:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-11-07 00:41:57,055 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-11-07 00:41:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:57,056 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-11-07 00:41:57,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:41:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-11-07 00:41:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 00:41:57,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:57,058 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2020-11-07 00:41:57,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:41:57,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash 24385651, now seen corresponding path program 3 times [2020-11-07 00:41:57,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:57,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412898749] [2020-11-07 00:41:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:57,063 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:57,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:57,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:57,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:57,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-07 00:41:57,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412898749] [2020-11-07 00:41:57,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:57,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:41:57,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314793978] [2020-11-07 00:41:57,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:41:57,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:57,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:41:57,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:41:57,395 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-11-07 00:41:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:58,384 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-11-07 00:41:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:41:58,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-11-07 00:41:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:58,387 INFO L225 Difference]: With dead ends: 81 [2020-11-07 00:41:58,387 INFO L226 Difference]: Without dead ends: 60 [2020-11-07 00:41:58,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:41:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-07 00:41:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-11-07 00:41:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-07 00:41:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-11-07 00:41:58,405 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 57 [2020-11-07 00:41:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:58,405 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-11-07 00:41:58,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:41:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-11-07 00:41:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 00:41:58,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:58,408 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2020-11-07 00:41:58,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:41:58,408 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1633337214, now seen corresponding path program 4 times [2020-11-07 00:41:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:58,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520530136] [2020-11-07 00:41:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:58,412 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:41:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-07 00:41:58,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520530136] [2020-11-07 00:41:58,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:58,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:41:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686849263] [2020-11-07 00:41:58,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:41:58,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:41:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:41:58,769 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 18 states. [2020-11-07 00:41:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:59,906 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-11-07 00:41:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:41:59,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-11-07 00:41:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:59,909 INFO L225 Difference]: With dead ends: 88 [2020-11-07 00:41:59,909 INFO L226 Difference]: Without dead ends: 67 [2020-11-07 00:41:59,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 00:41:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-07 00:41:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-11-07 00:41:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 00:41:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-11-07 00:41:59,945 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 67 [2020-11-07 00:41:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:59,945 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-11-07 00:41:59,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:41:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-11-07 00:41:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 00:41:59,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:59,953 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2020-11-07 00:41:59,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:41:59,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1081957779, now seen corresponding path program 5 times [2020-11-07 00:41:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:59,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678030057] [2020-11-07 00:41:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:59,958 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:42:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-07 00:42:00,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678030057] [2020-11-07 00:42:00,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:00,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:42:00,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815502094] [2020-11-07 00:42:00,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:42:00,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:00,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:42:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:42:00,461 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 21 states. [2020-11-07 00:42:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:01,681 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-11-07 00:42:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:42:01,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-11-07 00:42:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:01,682 INFO L225 Difference]: With dead ends: 85 [2020-11-07 00:42:01,683 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:42:01,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:42:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:42:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:42:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:42:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:42:01,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2020-11-07 00:42:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:01,690 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:42:01,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:42:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:42:01,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:42:01,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:42:01,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:42:01,933 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-11-07 00:42:02,767 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,768 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,768 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,768 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,768 INFO L269 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,768 INFO L269 CegarLoopResult]: At program point L4-4(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,768 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L262 CegarLoopResult]: 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|)) [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point L4-2(line 4) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,769 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,770 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,770 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,770 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 00:42:02,771 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-11-07 00:42:02,771 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2020-11-07 00:42:02,771 INFO L262 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-11-07 00:42:02,771 INFO L262 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (<= main_~result~0 5) [2020-11-07 00:42:02,771 INFO L262 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: false [2020-11-07 00:42:02,771 INFO L269 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-07 00:42:02,771 INFO L269 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-11-07 00:42:02,771 INFO L262 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (<= |main_#t~ret9| 5) [2020-11-07 00:42:02,772 INFO L269 CegarLoopResult]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2020-11-07 00:42:02,772 INFO L269 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-11-07 00:42:02,772 INFO L262 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (<= |main_#t~ret9| 5) [2020-11-07 00:42:02,772 INFO L262 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (and (<= |main_#t~ret9| 5) (<= main_~result~0 5)) [2020-11-07 00:42:02,772 INFO L262 CegarLoopResult]: At program point idFINAL(lines 6 11) the Hoare annotation is: (<= |id_#res| 5) [2020-11-07 00:42:02,772 INFO L262 CegarLoopResult]: At program point idEXIT(lines 6 11) the Hoare annotation is: (<= |id_#res| 5) [2020-11-07 00:42:02,772 INFO L269 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L262 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (<= id_~ret~0 5) [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-11-07 00:42:02,773 INFO L269 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: true [2020-11-07 00:42:02,774 INFO L269 CegarLoopResult]: At program point L8-3(line 8) the Hoare annotation is: true [2020-11-07 00:42:02,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:42:02 BoogieIcfgContainer [2020-11-07 00:42:02,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:42:02,808 INFO L168 Benchmark]: Toolchain (without parser) took 10502.98 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 138.0 MB in the beginning and 200.5 MB in the end (delta: -62.5 MB). Peak memory consumption was 130.9 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:02,811 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory was 104.5 MB in the beginning and 104.3 MB in the end (delta: 131.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:42:02,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.02 ms. Allocated memory is still 160.4 MB. Free memory was 137.4 MB in the beginning and 128.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:02,813 INFO L168 Benchmark]: Boogie Preprocessor took 32.30 ms. Allocated memory is still 160.4 MB. Free memory was 128.3 MB in the beginning and 127.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:02,814 INFO L168 Benchmark]: RCFGBuilder took 555.73 ms. Allocated memory is still 160.4 MB. Free memory was 127.0 MB in the beginning and 113.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:02,817 INFO L168 Benchmark]: TraceAbstraction took 9603.54 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 144.9 MB in the beginning and 200.5 MB in the end (delta: -55.6 MB). Peak memory consumption was 136.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:02,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory was 104.5 MB in the beginning and 104.3 MB in the end (delta: 131.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.02 ms. Allocated memory is still 160.4 MB. Free memory was 137.4 MB in the beginning and 128.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.30 ms. Allocated memory is still 160.4 MB. Free memory was 128.3 MB in the beginning and 127.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 555.73 ms. Allocated memory is still 160.4 MB. Free memory was 127.0 MB in the beginning and 113.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9603.54 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 144.9 MB in the beginning and 200.5 MB in the end (delta: -55.6 MB). Peak memory consumption was 136.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 4]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: \result <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 248 SDtfs, 356 SDslu, 758 SDs, 0 SdLazy, 1282 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=7, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 82 PreInvPairs, 218 NumberOfFragments, 90 HoareAnnotationTreeSize, 82 FomulaSimplifications, 13744 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 42 FomulaSimplificationsInter, 3364 FormulaSimplificationTreeSizeReductionInter, 0.5s 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...