/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:14,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:14,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:14,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:45:14,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:14,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:14,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:14,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:14,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:14,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:14,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:14,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:14,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:14,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:14,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:14,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:14,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:14,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:14,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:14,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:14,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:14,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:14,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:14,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:14,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:14,646 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:14,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:14,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:14,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:14,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:14,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:14,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:14,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:14,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:14,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:14,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:14,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:14,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:14,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:14,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:14,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:14,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:14,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:14,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:14,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:14,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:14,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:14,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:14,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:14,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:14,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:15,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:15,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:15,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:15,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:15,102 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:15,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-11-06 22:45:15,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e14d04f/29636e66ce1249b4a2f1d1bca52d21cb/FLAGb9cdbc82a [2020-11-06 22:45:15,790 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:15,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-11-06 22:45:15,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e14d04f/29636e66ce1249b4a2f1d1bca52d21cb/FLAGb9cdbc82a [2020-11-06 22:45:16,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e14d04f/29636e66ce1249b4a2f1d1bca52d21cb [2020-11-06 22:45:16,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:16,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:16,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:16,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:16,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:16,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a20cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16, skipping insertion in model container [2020-11-06 22:45:16,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:16,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:16,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:16,429 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:16,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:16,466 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:16,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16 WrapperNode [2020-11-06 22:45:16,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:16,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:16,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:16,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:16,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (1/1) ... [2020-11-06 22:45:16,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:16,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:16,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:16,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:16,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (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 [2020-11-06 22:45:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 22:45:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:16,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:16,872 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:16,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:16 BoogieIcfgContainer [2020-11-06 22:45:16,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:16,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:16,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:16,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:16,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:16" (1/3) ... [2020-11-06 22:45:16,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe33cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:16, skipping insertion in model container [2020-11-06 22:45:16,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:16" (2/3) ... [2020-11-06 22:45:16,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe33cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:16, skipping insertion in model container [2020-11-06 22:45:16,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:16" (3/3) ... [2020-11-06 22:45:16,886 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-11-06 22:45:16,918 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:16,925 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:16,959 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:17,037 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:17,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:17,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:17,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:17,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:17,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:17,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:17,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-06 22:45:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:17,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:17,082 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:17,092 INFO L82 PathProgramCache]: Analyzing trace with hash 734717802, now seen corresponding path program 1 times [2020-11-06 22:45:17,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:17,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165884464] [2020-11-06 22:45:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:17,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:17,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165884464] [2020-11-06 22:45:17,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:17,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:17,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728986477] [2020-11-06 22:45:17,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:17,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:17,437 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-11-06 22:45:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:17,516 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-11-06 22:45:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:17,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-06 22:45:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:17,526 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:45:17,527 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:45:17,530 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 [2020-11-06 22:45:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:45:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:45:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:45:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-06 22:45:17,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-11-06 22:45:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:17,574 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-06 22:45:17,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-06 22:45:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:17,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:17,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:17,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:17,575 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:17,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2082071837, now seen corresponding path program 1 times [2020-11-06 22:45:17,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:17,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71289529] [2020-11-06 22:45:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:17,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:17,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71289529] [2020-11-06 22:45:17,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:17,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:45:17,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454425408] [2020-11-06 22:45:17,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:17,742 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-11-06 22:45:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:18,040 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-06 22:45:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:18,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-06 22:45:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:18,042 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:45:18,042 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:45:18,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:45:18,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-06 22:45:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:45:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-06 22:45:18,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-11-06 22:45:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:18,053 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-06 22:45:18,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-06 22:45:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:45:18,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:18,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:18,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:18,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:18,056 INFO L82 PathProgramCache]: Analyzing trace with hash -569959400, now seen corresponding path program 1 times [2020-11-06 22:45:18,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:18,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205058144] [2020-11-06 22:45:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:18,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:18,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205058144] [2020-11-06 22:45:18,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690821377] [2020-11-06 22:45:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:18,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:45:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:18,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:18,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:18,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-06 22:45:18,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362213516] [2020-11-06 22:45:18,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:45:18,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:18,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:45:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:45:18,832 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 15 states. [2020-11-06 22:45:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:19,413 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-06 22:45:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:19,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-11-06 22:45:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:19,416 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:45:19,417 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:45:19,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:45:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:45:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-11-06 22:45:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:45:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-06 22:45:19,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-11-06 22:45:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:19,428 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-06 22:45:19,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:45:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-06 22:45:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:45:19,430 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:19,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:19,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:19,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2009440877, now seen corresponding path program 2 times [2020-11-06 22:45:19,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:19,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908609547] [2020-11-06 22:45:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:19,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908609547] [2020-11-06 22:45:20,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797973560] [2020-11-06 22:45:20,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:20,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:45:20,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:20,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:20,233 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:45:20,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:20,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:20,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-11-06 22:45:20,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601399470] [2020-11-06 22:45:20,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:45:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:45:20,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:45:20,288 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 19 states. [2020-11-06 22:45:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:21,354 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-06 22:45:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:45:21,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-11-06 22:45:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:21,357 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:45:21,357 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:45:21,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:45:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:45:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-06 22:45:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:45:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-06 22:45:21,367 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-11-06 22:45:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:21,368 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-06 22:45:21,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:45:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-06 22:45:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:45:21,369 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:21,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:21,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,584 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1892499409, now seen corresponding path program 1 times [2020-11-06 22:45:21,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:21,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939678370] [2020-11-06 22:45:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939678370] [2020-11-06 22:45:21,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860787588] [2020-11-06 22:45:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:45:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:21,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-06 22:45:21,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243365508] [2020-11-06 22:45:21,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:45:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:45:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:21,877 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-11-06 22:45:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:22,046 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-11-06 22:45:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:22,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-06 22:45:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:22,048 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:45:22,048 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:45:22,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:45:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:45:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:45:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:45:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-06 22:45:22,056 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-11-06 22:45:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:22,056 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-06 22:45:22,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:45:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-06 22:45:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:45:22,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:22,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:22,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:22,274 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1681738700, now seen corresponding path program 2 times [2020-11-06 22:45:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:22,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514301377] [2020-11-06 22:45:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:22,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:22,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514301377] [2020-11-06 22:45:22,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011744148] [2020-11-06 22:45:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:22,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:22,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:22,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-06 22:45:22,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440997405] [2020-11-06 22:45:22,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:45:22,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:45:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:45:22,602 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-11-06 22:45:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:22,891 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-11-06 22:45:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:45:22,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-11-06 22:45:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:22,899 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:45:22,899 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:45:22,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:45:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:45:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:45:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:45:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-06 22:45:22,907 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-11-06 22:45:22,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:22,907 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-06 22:45:22,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:45:22,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-06 22:45:22,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:45:22,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:22,908 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:23,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,113 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash -538050551, now seen corresponding path program 3 times [2020-11-06 22:45:23,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:23,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326480817] [2020-11-06 22:45:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:45:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326480817] [2020-11-06 22:45:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203135148] [2020-11-06 22:45:23,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:45:23,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-06 22:45:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:23,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:23,815 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:45:23,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:23,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:23,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:23,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2020-11-06 22:45:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838804069] [2020-11-06 22:45:23,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-06 22:45:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-06 22:45:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:45:23,879 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-11-06 22:45:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:25,669 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-06 22:45:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:45:25,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-11-06 22:45:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:25,671 INFO L225 Difference]: With dead ends: 53 [2020-11-06 22:45:25,671 INFO L226 Difference]: Without dead ends: 45 [2020-11-06 22:45:25,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:45:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-06 22:45:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-11-06 22:45:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-06 22:45:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-06 22:45:25,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2020-11-06 22:45:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:25,682 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-06 22:45:25,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-06 22:45:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-06 22:45:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:45:25,683 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:25,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:25,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:45:25,898 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -931077561, now seen corresponding path program 3 times [2020-11-06 22:45:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:25,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586201311] [2020-11-06 22:45:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:26,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:26,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586201311] [2020-11-06 22:45:26,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908611396] [2020-11-06 22:45:26,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:26,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:45:26,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:26,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:45:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:26,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:26,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-11-06 22:45:26,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103676106] [2020-11-06 22:45:26,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:45:26,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:45:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:45:26,275 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2020-11-06 22:45:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:26,670 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-06 22:45:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:26,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-11-06 22:45:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:26,672 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:45:26,673 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:45:26,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:45:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:45:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-06 22:45:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:45:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-11-06 22:45:26,682 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-11-06 22:45:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:26,682 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-11-06 22:45:26,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:45:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-11-06 22:45:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:45:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:26,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:26,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:26,897 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1680948414, now seen corresponding path program 4 times [2020-11-06 22:45:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:26,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660761180] [2020-11-06 22:45:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:27,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:27,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660761180] [2020-11-06 22:45:27,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90171264] [2020-11-06 22:45:27,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:27,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:45:27,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:45:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:27,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:27,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-11-06 22:45:27,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326415228] [2020-11-06 22:45:27,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:45:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:45:27,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:45:27,368 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 21 states. [2020-11-06 22:45:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:27,954 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-11-06 22:45:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:45:27,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-11-06 22:45:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:27,956 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:45:27,956 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:45:27,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=594, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:45:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:45:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-06 22:45:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:45:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-06 22:45:27,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-11-06 22:45:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:27,966 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-06 22:45:27,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:45:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-06 22:45:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:45:27,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:27,968 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:28,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:28,183 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1660792509, now seen corresponding path program 5 times [2020-11-06 22:45:28,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:28,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087475047] [2020-11-06 22:45:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:28,209 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:28,226 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:28,258 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:28,258 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:28,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:45:28,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:28 BoogieIcfgContainer [2020-11-06 22:45:28,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:28,298 INFO L168 Benchmark]: Toolchain (without parser) took 12190.25 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.9 MB in the beginning and 150.0 MB in the end (delta: -24.1 MB). Peak memory consumption was 44.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:28,299 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:28,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 116.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:28,301 INFO L168 Benchmark]: Boogie Preprocessor took 38.34 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:28,301 INFO L168 Benchmark]: RCFGBuilder took 367.22 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 101.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:28,302 INFO L168 Benchmark]: TraceAbstraction took 11419.14 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.1 MB in the beginning and 150.0 MB in the end (delta: -48.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:28,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 342.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 116.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.34 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 367.22 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 101.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11419.14 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.1 MB in the beginning and 150.0 MB in the end (delta: -48.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, j=10, n=0, n=6] [L24] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L25] COND TRUE i