/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/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:18:34,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:18:34,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:18:34,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:18:34,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:18:34,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:18:34,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:18:34,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:18:34,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:18:34,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:18:34,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:18:34,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:18:34,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:18:34,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:18:34,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:18:34,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:18:34,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:18:34,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:18:34,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:18:34,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:18:34,712 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 22:18:34,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:18:34,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:18:34,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:18:34,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:18:34,777 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:18:34,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:18:34,777 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:18:34,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:18:34,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:18:34,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:18:34,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:18:34,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:18:34,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:18:34,780 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:18:34,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:18:34,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:18:34,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:18:34,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:18:34,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:18:34,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:18:34,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:18:34,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:18:34,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:18:34,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:18:34,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:18:34,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:18:34,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:18:34,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:18:34,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:18:34,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:18:35,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:18:35,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:18:35,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:18:35,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:18:35,260 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:18:35,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-11-06 22:18:35,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7aa7203/2b7361bcc017432f86175fec5b565492/FLAG3d1039646 [2020-11-06 22:18:35,969 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:18:35,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-11-06 22:18:35,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7aa7203/2b7361bcc017432f86175fec5b565492/FLAG3d1039646 [2020-11-06 22:18:36,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7aa7203/2b7361bcc017432f86175fec5b565492 [2020-11-06 22:18:36,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:18:36,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:18:36,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:18:36,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:18:36,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:18:36,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ab84bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36, skipping insertion in model container [2020-11-06 22:18:36,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:18:36,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:18:36,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:18:36,629 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:18:36,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:18:36,659 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:18:36,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36 WrapperNode [2020-11-06 22:18:36,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:18:36,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:18:36,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:18:36,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:18:36,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (1/1) ... [2020-11-06 22:18:36,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:18:36,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:18:36,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:18:36,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:18:36,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (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 22:18:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:18:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:18:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:18:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-06 22:18:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:18:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:18:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:18:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:18:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:18:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:18:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-06 22:18:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:18:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:18:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:18:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:18:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:18:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:18:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:18:37,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:18:37,048 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:18:37,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:37 BoogieIcfgContainer [2020-11-06 22:18:37,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:18:37,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:18:37,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:18:37,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:18:37,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:36" (1/3) ... [2020-11-06 22:18:37,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5447b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:37, skipping insertion in model container [2020-11-06 22:18:37,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:36" (2/3) ... [2020-11-06 22:18:37,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5447b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:37, skipping insertion in model container [2020-11-06 22:18:37,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:37" (3/3) ... [2020-11-06 22:18:37,062 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-11-06 22:18:37,097 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:18:37,107 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:18:37,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:18:37,203 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:18:37,204 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:18:37,204 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:18:37,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:18:37,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:18:37,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:18:37,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:18:37,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:18:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-06 22:18:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:18:37,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:37,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:37,241 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1708859500, now seen corresponding path program 1 times [2020-11-06 22:18:37,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:37,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755460658] [2020-11-06 22:18:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:37,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:37,813 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 22:18:37,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755460658] [2020-11-06 22:18:37,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:18:37,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:18:37,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912293245] [2020-11-06 22:18:37,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:18:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:18:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:18:37,847 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-11-06 22:18:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:38,271 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-11-06 22:18:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:18:38,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:18:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:38,297 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:18:38,298 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:18:38,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 22:18:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:18:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:18:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:18:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-06 22:18:38,398 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-11-06 22:18:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:38,399 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-06 22:18:38,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:18:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-06 22:18:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:18:38,403 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:38,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:38,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:18:38,404 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2119969838, now seen corresponding path program 1 times [2020-11-06 22:18:38,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:38,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221008698] [2020-11-06 22:18:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:38,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:38,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:38,538 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 22:18:38,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221008698] [2020-11-06 22:18:38,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:18:38,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:18:38,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394891610] [2020-11-06 22:18:38,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:18:38,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:18:38,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:18:38,545 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-11-06 22:18:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:38,774 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-11-06 22:18:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:18:38,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:18:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:38,778 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:18:38,778 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:18:38,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:18:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:18:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-06 22:18:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:18:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-06 22:18:38,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-11-06 22:18:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:38,792 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-06 22:18:38,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:18:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-06 22:18:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:18:38,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:38,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:38,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:18:38,795 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash -308126725, now seen corresponding path program 1 times [2020-11-06 22:18:38,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:38,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913724601] [2020-11-06 22:18:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:38,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:38,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:39,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:39,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:18:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:18:39,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913724601] [2020-11-06 22:18:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464148854] [2020-11-06 22:18:39,039 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 22:18:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:18:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:18:39,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:39,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-11-06 22:18:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704171540] [2020-11-06 22:18:39,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:18:39,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:18:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:18:39,256 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2020-11-06 22:18:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:39,687 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-11-06 22:18:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:18:39,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-11-06 22:18:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:39,689 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:18:39,690 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:18:39,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:18:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:18:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-06 22:18:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:18:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-06 22:18:39,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 28 [2020-11-06 22:18:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:39,711 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-06 22:18:39,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:18:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-06 22:18:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:18:39,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:39,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:39,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:18:39,931 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1144313053, now seen corresponding path program 1 times [2020-11-06 22:18:39,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:39,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236853262] [2020-11-06 22:18:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:40,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:40,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:18:40,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236853262] [2020-11-06 22:18:40,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998235641] [2020-11-06 22:18:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:18:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:18:40,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:40,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:18:40,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921585754] [2020-11-06 22:18:40,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:18:40,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:18:40,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:18:40,294 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-11-06 22:18:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:40,707 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-11-06 22:18:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:18:40,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-11-06 22:18:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:40,711 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:18:40,712 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:18:40,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:18:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:18:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-06 22:18:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:18:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-11-06 22:18:40,742 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 29 [2020-11-06 22:18:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:40,746 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-11-06 22:18:40,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:18:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-11-06 22:18:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:18:40,751 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:40,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:40,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:40,969 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1249611306, now seen corresponding path program 2 times [2020-11-06 22:18:40,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:40,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414155676] [2020-11-06 22:18:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-06 22:18:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414155676] [2020-11-06 22:18:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426244853] [2020-11-06 22:18:41,159 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 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 22:18:41,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:18:41,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:18:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-06 22:18:41,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:41,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-06 22:18:41,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235833507] [2020-11-06 22:18:41,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:18:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:18:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:18:41,358 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 13 states. [2020-11-06 22:18:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:42,445 INFO L93 Difference]: Finished difference Result 75 states and 112 transitions. [2020-11-06 22:18:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:18:42,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-11-06 22:18:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:42,454 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:18:42,454 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:18:42,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:18:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:18:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-06 22:18:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-06 22:18:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-11-06 22:18:42,471 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 42 [2020-11-06 22:18:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:42,472 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-11-06 22:18:42,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:18:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-11-06 22:18:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-06 22:18:42,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:42,476 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:42,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:42,691 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1158728484, now seen corresponding path program 3 times [2020-11-06 22:18:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:42,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678320754] [2020-11-06 22:18:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:42,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:42,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-11-06 22:18:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678320754] [2020-11-06 22:18:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953231641] [2020-11-06 22:18:43,185 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 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 22:18:43,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-06 22:18:43,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:18:43,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-11-06 22:18:43,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:43,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-11-06 22:18:43,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017056730] [2020-11-06 22:18:43,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:18:43,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:18:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:18:43,470 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 14 states. [2020-11-06 22:18:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:44,767 INFO L93 Difference]: Finished difference Result 95 states and 139 transitions. [2020-11-06 22:18:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:18:44,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-11-06 22:18:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:44,773 INFO L225 Difference]: With dead ends: 95 [2020-11-06 22:18:44,773 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 22:18:44,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:18:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 22:18:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-06 22:18:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-06 22:18:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-11-06 22:18:44,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 98 [2020-11-06 22:18:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:44,793 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-11-06 22:18:44,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:18:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-11-06 22:18:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-06 22:18:44,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:44,798 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:45,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:45,010 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:45,012 INFO L82 PathProgramCache]: Analyzing trace with hash -73042607, now seen corresponding path program 4 times [2020-11-06 22:18:45,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:45,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112353078] [2020-11-06 22:18:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-11-06 22:18:45,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112353078] [2020-11-06 22:18:45,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824924846] [2020-11-06 22:18:45,736 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 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 22:18:45,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:18:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:18:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-11-06 22:18:45,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:45,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 16 [2020-11-06 22:18:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361524694] [2020-11-06 22:18:45,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:18:45,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:18:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:18:45,985 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 16 states. [2020-11-06 22:18:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:47,934 INFO L93 Difference]: Finished difference Result 122 states and 185 transitions. [2020-11-06 22:18:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:18:47,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 138 [2020-11-06 22:18:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:47,938 INFO L225 Difference]: With dead ends: 122 [2020-11-06 22:18:47,939 INFO L226 Difference]: Without dead ends: 78 [2020-11-06 22:18:47,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-11-06 22:18:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-06 22:18:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-11-06 22:18:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-06 22:18:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2020-11-06 22:18:47,959 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 138 [2020-11-06 22:18:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:47,959 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2020-11-06 22:18:47,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:18:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2020-11-06 22:18:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-06 22:18:47,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:47,964 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:48,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:18:48,173 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:48,174 INFO L82 PathProgramCache]: Analyzing trace with hash -732775580, now seen corresponding path program 5 times [2020-11-06 22:18:48,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:48,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57890808] [2020-11-06 22:18:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-11-06 22:18:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-11-06 22:18:48,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57890808] [2020-11-06 22:18:48,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167931415] [2020-11-06 22:18:48,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 22:18:48,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-06 22:18:48,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:18:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 328 proven. 115 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2020-11-06 22:18:49,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:49,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2020-11-06 22:18:49,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029308603] [2020-11-06 22:18:49,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:18:49,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:49,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:18:49,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:18:49,071 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand 12 states. [2020-11-06 22:18:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:50,015 INFO L93 Difference]: Finished difference Result 189 states and 276 transitions. [2020-11-06 22:18:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:18:50,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 179 [2020-11-06 22:18:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:50,022 INFO L225 Difference]: With dead ends: 189 [2020-11-06 22:18:50,022 INFO L226 Difference]: Without dead ends: 184 [2020-11-06 22:18:50,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:18:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-06 22:18:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2020-11-06 22:18:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-06 22:18:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 252 transitions. [2020-11-06 22:18:50,070 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 252 transitions. Word has length 179 [2020-11-06 22:18:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:50,071 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 252 transitions. [2020-11-06 22:18:50,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:18:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 252 transitions. [2020-11-06 22:18:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-11-06 22:18:50,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:50,079 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:50,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:50,293 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1616639890, now seen corresponding path program 6 times [2020-11-06 22:18:50,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:50,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335883936] [2020-11-06 22:18:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:50,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:50,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:50,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-11-06 22:18:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-11-06 22:18:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:51,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:52,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-11-06 22:18:52,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335883936] [2020-11-06 22:18:52,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558780589] [2020-11-06 22:18:52,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 22:18:52,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2020-11-06 22:18:52,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 167 conjunts are in the unsatisfiable core [2020-11-06 22:18:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-11-06 22:18:53,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:53,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 29 [2020-11-06 22:18:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343651216] [2020-11-06 22:18:53,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-06 22:18:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-06 22:18:53,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:18:53,917 INFO L87 Difference]: Start difference. First operand 172 states and 252 transitions. Second operand 29 states. [2020-11-06 22:18:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:56,554 INFO L93 Difference]: Finished difference Result 296 states and 502 transitions. [2020-11-06 22:18:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:18:56,558 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 288 [2020-11-06 22:18:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:56,573 INFO L225 Difference]: With dead ends: 296 [2020-11-06 22:18:56,573 INFO L226 Difference]: Without dead ends: 291 [2020-11-06 22:18:56,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 407 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=171, Invalid=2279, Unknown=0, NotChecked=0, Total=2450 [2020-11-06 22:18:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-06 22:18:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 187. [2020-11-06 22:18:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-06 22:18:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 290 transitions. [2020-11-06 22:18:56,677 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 290 transitions. Word has length 288 [2020-11-06 22:18:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:56,683 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 290 transitions. [2020-11-06 22:18:56,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-06 22:18:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 290 transitions. [2020-11-06 22:18:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-11-06 22:18:56,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:56,690 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:56,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:56,904 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 323700080, now seen corresponding path program 7 times [2020-11-06 22:18:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:56,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412865446] [2020-11-06 22:18:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-06 22:18:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-11-06 22:18:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-11-06 22:18:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 450 proven. 906 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2020-11-06 22:18:57,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412865446] [2020-11-06 22:18:57,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61604158] [2020-11-06 22:18:57,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:58,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:18:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 355 proven. 1303 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2020-11-06 22:18:58,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:58,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-11-06 22:18:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559071268] [2020-11-06 22:18:58,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:18:58,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:18:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:18:58,274 INFO L87 Difference]: Start difference. First operand 187 states and 290 transitions. Second operand 18 states. [2020-11-06 22:19:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:00,025 INFO L93 Difference]: Finished difference Result 452 states and 888 transitions. [2020-11-06 22:19:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:19:00,026 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 315 [2020-11-06 22:19:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:00,028 INFO L225 Difference]: With dead ends: 452 [2020-11-06 22:19:00,029 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:19:00,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-11-06 22:19:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:19:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:19:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:19:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:19:00,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 315 [2020-11-06 22:19:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:00,037 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:19:00,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:19:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:19:00,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:19:00,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:19:00,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:19:01,893 WARN L194 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 6 [2020-11-06 22:19:02,957 WARN L194 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 45 [2020-11-06 22:19:02,962 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:19:02,963 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:19:02,963 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:19:02,963 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:19:02,963 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:02,963 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|)) [2020-11-06 22:19:02,964 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:02,964 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:02,964 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:19:02,964 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:19:02,964 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:02,964 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 25 32) the Hoare annotation is: true [2020-11-06 22:19:02,964 INFO L262 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: false [2020-11-06 22:19:02,964 INFO L266 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 25 32) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 25 32) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L266 CegarLoopResult]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2020-11-06 22:19:02,965 INFO L262 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo_#in~n|) (= fibo_~n |fibo_#in~n|)) [2020-11-06 22:19:02,966 INFO L266 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-06 22:19:02,968 INFO L262 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo_~n |fibo_#in~n|)) (.cse1 (<= |fibo_#in~n| 3))) (and (or (and (<= 5 |fibo_#t~ret7|) (<= |fibo_#t~ret7| 5) (<= |fibo_#in~n| 6) .cse0 (<= 6 |fibo_#in~n|)) (and (<= |fibo_#t~ret7| 2) (<= |fibo_#in~n| 4) .cse0 (<= 2 |fibo_#t~ret7|)) (and (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret7| 3) (<= fibo_~n 5) .cse0 (<= 3 |fibo_#t~ret7|)) (and (<= |fibo_#t~ret7| 8) (<= 8 |fibo_#t~ret7|) (<= 7 |fibo_#in~n|) .cse0) (and (<= 2 |fibo_#in~n|) (<= |fibo_#in~n| 2)) (and .cse0 (<= 8 |fibo_#in~n|)) (and (<= 3 |fibo_#in~n|) .cse1)) (or (and (<= |fibo_#t~ret7| 1) (<= 1 |fibo_#t~ret7|) .cse0) (not .cse1)))) [2020-11-06 22:19:02,968 INFO L266 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-11-06 22:19:02,968 INFO L266 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-11-06 22:19:02,968 INFO L266 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-11-06 22:19:02,969 INFO L269 CegarLoopResult]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2020-11-06 22:19:02,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:19:02 BoogieIcfgContainer [2020-11-06 22:19:02,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:19:02,984 INFO L168 Benchmark]: Toolchain (without parser) took 26601.82 ms. Allocated memory was 167.8 MB in the beginning and 455.1 MB in the end (delta: 287.3 MB). Free memory was 143.1 MB in the beginning and 254.3 MB in the end (delta: -111.2 MB). Peak memory consumption was 267.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:02,985 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 167.8 MB. Free memory was 141.3 MB in the beginning and 141.2 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:19:02,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.77 ms. Allocated memory is still 167.8 MB. Free memory was 142.4 MB in the beginning and 133.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:02,986 INFO L168 Benchmark]: Boogie Preprocessor took 30.16 ms. Allocated memory is still 167.8 MB. Free memory was 133.3 MB in the beginning and 132.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:02,990 INFO L168 Benchmark]: RCFGBuilder took 358.31 ms. Allocated memory is still 167.8 MB. Free memory was 132.0 MB in the beginning and 119.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:02,992 INFO L168 Benchmark]: TraceAbstraction took 25921.86 ms. Allocated memory was 167.8 MB in the beginning and 455.1 MB in the end (delta: 287.3 MB). Free memory was 118.8 MB in the beginning and 254.3 MB in the end (delta: -135.5 MB). Peak memory consumption was 243.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:03,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 167.8 MB. Free memory was 141.3 MB in the beginning and 141.2 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.77 ms. Allocated memory is still 167.8 MB. Free memory was 142.4 MB in the beginning and 133.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.16 ms. Allocated memory is still 167.8 MB. Free memory was 133.3 MB in the beginning and 132.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.31 ms. Allocated memory is still 167.8 MB. Free memory was 132.0 MB in the beginning and 119.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25921.86 ms. Allocated memory was 167.8 MB in the beginning and 455.1 MB in the end (delta: 287.3 MB). Free memory was 118.8 MB in the beginning and 254.3 MB in the end (delta: -135.5 MB). Peak memory consumption was 243.5 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.0s, OverallIterations: 10, TraceHistogramMax: 45, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 606 SDslu, 561 SDs, 0 SdLazy, 3132 SolverSat, 678 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1726 GetRequests, 1470 SyntacticMatches, 23 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 127 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 328 PreInvPairs, 520 NumberOfFragments, 147 HoareAnnotationTreeSize, 328 FomulaSimplifications, 16467 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 10 FomulaSimplificationsInter, 11816 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 2265 NumberOfCodeBlocks, 2210 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 2247 ConstructedInterpolants, 0 QuantifiedInterpolants, 1201777 SizeOfPredicates, 35 NumberOfNonLiveVariables, 2817 ConjunctsInSsa, 235 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 19608/26336 InterpolantCoveringCapability, 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...