/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:40:50,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:40:50,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:40:51,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:40:51,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:40:51,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:40:51,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:40:51,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:40:51,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:40:51,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:40:51,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:40:51,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:40:51,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:40:51,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:40:51,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:40:51,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:40:51,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:40:51,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:40:51,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:40:51,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:40:51,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:40:51,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:40:51,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:40:51,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:40:51,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:40:51,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:40:51,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:40:51,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:40:51,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:40:51,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:40:51,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:40:51,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:40:51,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:40:51,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:40:51,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:40:51,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:40:51,044 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 [2019-11-06 18:40:51,066 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:40:51,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:40:51,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:40:51,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:40:51,068 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:40:51,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:40:51,068 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:40:51,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:40:51,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:40:51,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:40:51,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:40:51,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:40:51,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:40:51,070 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:40:51,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:40:51,070 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:40:51,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:40:51,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:40:51,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:40:51,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:40:51,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:40:51,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:40:51,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:40:51,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:40:51,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:40:51,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:40:51,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:40:51,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:40:51,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:40:51,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:40:51,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:40:51,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:40:51,352 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:40:51,352 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:40:51,353 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-06 18:40:51,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9406face/20e236e6839a4359a56bb980ab761c18/FLAG2b4124b13 [2019-11-06 18:40:51,829 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:40:51,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-06 18:40:51,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9406face/20e236e6839a4359a56bb980ab761c18/FLAG2b4124b13 [2019-11-06 18:40:52,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9406face/20e236e6839a4359a56bb980ab761c18 [2019-11-06 18:40:52,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:40:52,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:40:52,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:40:52,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:40:52,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:40:52,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b51c073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52, skipping insertion in model container [2019-11-06 18:40:52,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,269 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:40:52,288 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:40:52,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:40:52,509 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:40:52,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:40:52,547 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:40:52,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52 WrapperNode [2019-11-06 18:40:52,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:40:52,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:40:52,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:40:52,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:40:52,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... [2019-11-06 18:40:52,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:40:52,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:40:52,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:40:52,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:40:52,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:40:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:40:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:40:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:40:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:40:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:40:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:40:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:40:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:40:53,018 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:40:53,018 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:40:53,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:40:53 BoogieIcfgContainer [2019-11-06 18:40:53,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:40:53,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:40:53,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:40:53,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:40:53,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:40:52" (1/3) ... [2019-11-06 18:40:53,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b62b8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:40:53, skipping insertion in model container [2019-11-06 18:40:53,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:52" (2/3) ... [2019-11-06 18:40:53,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b62b8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:40:53, skipping insertion in model container [2019-11-06 18:40:53,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:40:53" (3/3) ... [2019-11-06 18:40:53,042 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2019-11-06 18:40:53,066 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:40:53,084 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:40:53,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:40:53,129 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:40:53,129 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:40:53,130 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:40:53,130 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:40:53,130 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:40:53,130 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:40:53,130 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:40:53,130 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:40:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-06 18:40:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:40:53,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:53,160 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:53,162 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2019-11-06 18:40:53,173 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:53,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976871379] [2019-11-06 18:40:53,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:53,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976871379] [2019-11-06 18:40:53,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:53,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:40:53,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813057740] [2019-11-06 18:40:53,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:40:53,334 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:40:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:40:53,350 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-06 18:40:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:53,465 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-11-06 18:40:53,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:40:53,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:40:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:53,475 INFO L225 Difference]: With dead ends: 52 [2019-11-06 18:40:53,475 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:40:53,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:40:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:40:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 18:40:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:40:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-06 18:40:53,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-11-06 18:40:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:53,521 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-06 18:40:53,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:40:53,521 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-06 18:40:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:40:53,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:53,523 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:53,523 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2019-11-06 18:40:53,524 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:53,524 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565608486] [2019-11-06 18:40:53,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:53,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565608486] [2019-11-06 18:40:53,607 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:53,607 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:40:53,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190381861] [2019-11-06 18:40:53,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:53,609 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:53,610 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2019-11-06 18:40:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:53,702 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-06 18:40:53,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:53,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:40:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:53,704 INFO L225 Difference]: With dead ends: 44 [2019-11-06 18:40:53,705 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:40:53,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:40:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-06 18:40:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:40:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-06 18:40:53,720 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2019-11-06 18:40:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:53,720 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-06 18:40:53,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-06 18:40:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:40:53,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:53,723 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:53,724 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1114616120, now seen corresponding path program 1 times [2019-11-06 18:40:53,726 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:53,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058368995] [2019-11-06 18:40:53,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:53,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058368995] [2019-11-06 18:40:53,839 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:53,839 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:40:53,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146962883] [2019-11-06 18:40:53,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:53,840 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:53,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:53,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:53,841 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2019-11-06 18:40:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:53,914 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-06 18:40:53,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:53,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:40:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:53,915 INFO L225 Difference]: With dead ends: 44 [2019-11-06 18:40:53,915 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:40:53,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:40:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-06 18:40:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:40:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-06 18:40:53,923 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2019-11-06 18:40:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:53,923 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-06 18:40:53,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-06 18:40:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:40:53,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:53,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:53,924 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2019-11-06 18:40:53,925 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:53,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655367367] [2019-11-06 18:40:53,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:40:53,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655367367] [2019-11-06 18:40:53,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742707731] [2019-11-06 18:40:53,999 INFO L94 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 [2019-11-06 18:40:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:54,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:40:54,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:40:54,105 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:54,105 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:40:54,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300699273] [2019-11-06 18:40:54,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:40:54,106 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:40:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:40:54,107 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2019-11-06 18:40:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:54,212 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-06 18:40:54,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:40:54,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-06 18:40:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:54,214 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:40:54,214 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:40:54,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:40:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:40:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-06 18:40:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:40:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-06 18:40:54,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2019-11-06 18:40:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:54,221 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-06 18:40:54,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:40:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-06 18:40:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:40:54,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:54,222 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:54,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:54,428 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash -425990958, now seen corresponding path program 2 times [2019-11-06 18:40:54,429 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:54,429 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582270601] [2019-11-06 18:40:54,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:40:54,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582270601] [2019-11-06 18:40:54,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271629306] [2019-11-06 18:40:54,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:54,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:54,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:54,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:40:54,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:40:54,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:54,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:40:54,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760727807] [2019-11-06 18:40:54,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:40:54,605 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:40:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:40:54,606 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2019-11-06 18:40:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:54,736 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:40:54,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:40:54,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-06 18:40:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:54,740 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:40:54,740 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:40:54,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:40:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:40:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-11-06 18:40:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:40:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-11-06 18:40:54,751 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2019-11-06 18:40:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:54,753 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-11-06 18:40:54,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:40:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-11-06 18:40:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:40:54,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:54,755 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:54,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:54,956 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2001812716, now seen corresponding path program 3 times [2019-11-06 18:40:54,957 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:54,957 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533639552] [2019-11-06 18:40:54,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:40:55,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533639552] [2019-11-06 18:40:55,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000213617] [2019-11-06 18:40:55,043 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:40:55,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:40:55,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:55,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:40:55,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:40:55,139 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:55,140 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-06 18:40:55,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333129891] [2019-11-06 18:40:55,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:40:55,141 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:40:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:40:55,142 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2019-11-06 18:40:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:55,300 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-06 18:40:55,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:40:55,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-11-06 18:40:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:55,302 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:40:55,302 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:40:55,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:40:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:40:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-06 18:40:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:40:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-06 18:40:55,315 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 31 [2019-11-06 18:40:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:55,315 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-06 18:40:55,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:40:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-06 18:40:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:40:55,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:55,318 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:55,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:55,519 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1767528838, now seen corresponding path program 4 times [2019-11-06 18:40:55,520 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:55,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188102315] [2019-11-06 18:40:55,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:40:55,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188102315] [2019-11-06 18:40:55,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427166354] [2019-11-06 18:40:55,725 INFO L92 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 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 [2019-11-06 18:40:55,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:55,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:55,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:40:55,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:40:55,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:55,870 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-06 18:40:55,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408904116] [2019-11-06 18:40:55,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:40:55,871 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:55,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:40:55,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:40:55,872 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2019-11-06 18:40:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:56,011 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2019-11-06 18:40:56,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:40:56,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-06 18:40:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:56,012 INFO L225 Difference]: With dead ends: 78 [2019-11-06 18:40:56,012 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:40:56,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:40:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:40:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-06 18:40:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:40:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-11-06 18:40:56,019 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 37 [2019-11-06 18:40:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:56,020 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-11-06 18:40:56,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:40:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-11-06 18:40:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:40:56,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:56,021 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:56,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:56,230 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash -318121312, now seen corresponding path program 5 times [2019-11-06 18:40:56,231 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:56,232 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494796534] [2019-11-06 18:40:56,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:40:56,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494796534] [2019-11-06 18:40:56,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149687855] [2019-11-06 18:40:56,379 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-06 18:40:56,808 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:40:56,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:56,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:40:56,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:40:56,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:56,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:40:56,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992680445] [2019-11-06 18:40:56,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:40:56,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:56,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:40:56,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:56,829 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 9 states. [2019-11-06 18:40:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:56,934 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2019-11-06 18:40:56,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:40:56,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-11-06 18:40:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:56,935 INFO L225 Difference]: With dead ends: 75 [2019-11-06 18:40:56,935 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:40:56,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:40:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-06 18:40:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:40:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-06 18:40:56,942 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2019-11-06 18:40:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:56,943 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-06 18:40:56,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:40:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-06 18:40:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:40:56,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:56,944 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:57,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:57,149 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:57,150 INFO L82 PathProgramCache]: Analyzing trace with hash -249467492, now seen corresponding path program 6 times [2019-11-06 18:40:57,150 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:57,150 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091784320] [2019-11-06 18:40:57,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:40:57,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091784320] [2019-11-06 18:40:57,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525622676] [2019-11-06 18:40:57,236 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:40:57,338 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 18:40:57,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:57,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:40:57,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:40:57,409 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:57,409 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-06 18:40:57,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656641529] [2019-11-06 18:40:57,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:40:57,410 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:40:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:40:57,411 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 15 states. [2019-11-06 18:40:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:57,602 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2019-11-06 18:40:57,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:40:57,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2019-11-06 18:40:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:57,604 INFO L225 Difference]: With dead ends: 96 [2019-11-06 18:40:57,604 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:40:57,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:40:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:40:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-06 18:40:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:40:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-11-06 18:40:57,616 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2019-11-06 18:40:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:57,616 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-11-06 18:40:57,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:40:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-11-06 18:40:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:40:57,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:57,620 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:57,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:57,821 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:57,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1592097226, now seen corresponding path program 7 times [2019-11-06 18:40:57,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:57,822 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108113352] [2019-11-06 18:40:57,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:57,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108113352] [2019-11-06 18:40:57,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270671228] [2019-11-06 18:40:57,949 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:40:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:58,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:40:58,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:58,028 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:58,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:40:58,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43192767] [2019-11-06 18:40:58,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:40:58,032 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:40:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:40:58,033 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 11 states. [2019-11-06 18:40:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:58,122 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2019-11-06 18:40:58,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:40:58,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-06 18:40:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:58,123 INFO L225 Difference]: With dead ends: 100 [2019-11-06 18:40:58,124 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:40:58,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:40:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:40:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-06 18:40:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 18:40:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-11-06 18:40:58,138 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2019-11-06 18:40:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:58,139 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-11-06 18:40:58,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:40:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-11-06 18:40:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:40:58,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:58,140 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:58,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:58,344 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:58,344 INFO L82 PathProgramCache]: Analyzing trace with hash -263288236, now seen corresponding path program 8 times [2019-11-06 18:40:58,345 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:58,345 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055023655] [2019-11-06 18:40:58,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:58,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055023655] [2019-11-06 18:40:58,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010473778] [2019-11-06 18:40:58,458 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:40:58,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:58,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:58,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:40:58,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:58,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:58,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:40:58,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714420054] [2019-11-06 18:40:58,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:40:58,558 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:58,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:40:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:40:58,558 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 12 states. [2019-11-06 18:40:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:58,643 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2019-11-06 18:40:58,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:40:58,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-11-06 18:40:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:58,644 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:40:58,645 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:40:58,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:40:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:40:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-06 18:40:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:40:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-06 18:40:58,653 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2019-11-06 18:40:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:58,654 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-06 18:40:58,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:40:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-06 18:40:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:40:58,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:58,655 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:58,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:58,859 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1116864242, now seen corresponding path program 9 times [2019-11-06 18:40:58,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:58,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674690612] [2019-11-06 18:40:58,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:58,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674690612] [2019-11-06 18:40:58,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981579333] [2019-11-06 18:40:58,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:59,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 18:40:59,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:59,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:40:59,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:41:00,040 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:00,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-06 18:41:00,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130928437] [2019-11-06 18:41:00,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:41:00,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:00,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:41:00,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:41:00,042 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 21 states. [2019-11-06 18:41:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:00,257 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2019-11-06 18:41:00,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:41:00,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2019-11-06 18:41:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:00,258 INFO L225 Difference]: With dead ends: 112 [2019-11-06 18:41:00,258 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:41:00,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:41:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:41:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-06 18:41:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:41:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-11-06 18:41:00,265 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 57 [2019-11-06 18:41:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:00,266 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-11-06 18:41:00,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:41:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-11-06 18:41:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:41:00,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:00,267 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:00,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:00,472 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:00,472 INFO L82 PathProgramCache]: Analyzing trace with hash -967554040, now seen corresponding path program 10 times [2019-11-06 18:41:00,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:00,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179875769] [2019-11-06 18:41:00,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-06 18:41:00,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179875769] [2019-11-06 18:41:00,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465139288] [2019-11-06 18:41:00,667 INFO L92 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:00,731 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:00,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:00,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:41:00,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:41:00,937 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:00,937 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-06 18:41:00,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152597885] [2019-11-06 18:41:00,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:41:00,938 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:00,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:41:00,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:00,939 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 22 states. [2019-11-06 18:41:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:01,140 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2019-11-06 18:41:01,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:41:01,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2019-11-06 18:41:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:01,141 INFO L225 Difference]: With dead ends: 128 [2019-11-06 18:41:01,141 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 18:41:01,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 18:41:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2019-11-06 18:41:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:41:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2019-11-06 18:41:01,148 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2019-11-06 18:41:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:01,148 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2019-11-06 18:41:01,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:41:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2019-11-06 18:41:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:41:01,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:01,149 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:01,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:01,353 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1991451554, now seen corresponding path program 11 times [2019-11-06 18:41:01,354 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:01,354 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697881434] [2019-11-06 18:41:01,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-11-06 18:41:01,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697881434] [2019-11-06 18:41:01,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675091068] [2019-11-06 18:41:01,503 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true