/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/bitvector/jain_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 12:59:47,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 12:59:47,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 12:59:47,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 12:59:47,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 12:59:47,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 12:59:47,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 12:59:47,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 12:59:47,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 12:59:47,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 12:59:47,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 12:59:47,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 12:59:47,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 12:59:47,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 12:59:47,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 12:59:47,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 12:59:47,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 12:59:47,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 12:59:47,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 12:59:47,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 12:59:47,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 12:59:47,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 12:59:47,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 12:59:47,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 12:59:47,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 12:59:47,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 12:59:47,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 12:59:47,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 12:59:47,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 12:59:47,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 12:59:47,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 12:59:47,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 12:59:47,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 12:59:47,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 12:59:47,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 12:59:47,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 12:59:47,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 12:59:47,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 12:59:47,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 12:59:47,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 12:59:47,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 12:59:47,495 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 12:59:47,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 12:59:47,495 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 12:59:47,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 12:59:47,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 12:59:47,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 12:59:47,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 12:59:47,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 12:59:47,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 12:59:47,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 12:59:47,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 12:59:47,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 12:59:47,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 12:59:47,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 12:59:47,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 12:59:47,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 12:59:47,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 12:59:47,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 12:59:47,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 12:59:47,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 12:59:47,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 12:59:47,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 12:59:47,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 12:59:47,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 12:59:47,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 12:59:47,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 12:59:47,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 12:59:47,968 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 12:59:47,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 12:59:47,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 12:59:47,977 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 12:59:47,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/jain_4-2.c [2020-09-04 12:59:48,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c830cf8c/afc9e2d9bbeb4f86b4442cb442e3f119/FLAG2f16b922c [2020-09-04 12:59:48,566 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 12:59:48,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/jain_4-2.c [2020-09-04 12:59:48,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c830cf8c/afc9e2d9bbeb4f86b4442cb442e3f119/FLAG2f16b922c [2020-09-04 12:59:48,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c830cf8c/afc9e2d9bbeb4f86b4442cb442e3f119 [2020-09-04 12:59:48,921 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 12:59:48,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 12:59:48,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 12:59:48,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 12:59:48,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 12:59:48,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 12:59:48" (1/1) ... [2020-09-04 12:59:48,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a740c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:48, skipping insertion in model container [2020-09-04 12:59:48,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 12:59:48" (1/1) ... [2020-09-04 12:59:48,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 12:59:48,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 12:59:49,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 12:59:49,180 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 12:59:49,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 12:59:49,210 INFO L208 MainTranslator]: Completed translation [2020-09-04 12:59:49,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49 WrapperNode [2020-09-04 12:59:49,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 12:59:49,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 12:59:49,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 12:59:49,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 12:59:49,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... [2020-09-04 12:59:49,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 12:59:49,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 12:59:49,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 12:59:49,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 12:59:49,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 12:59:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 12:59:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 12:59:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 12:59:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 12:59:49,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 12:59:49,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 12:59:49,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 12:59:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 12:59:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 12:59:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 12:59:49,596 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 12:59:49,597 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 12:59:49,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 12:59:49 BoogieIcfgContainer [2020-09-04 12:59:49,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 12:59:49,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 12:59:49,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 12:59:49,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 12:59:49,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 12:59:48" (1/3) ... [2020-09-04 12:59:49,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4139c554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 12:59:49, skipping insertion in model container [2020-09-04 12:59:49,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:49" (2/3) ... [2020-09-04 12:59:49,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4139c554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 12:59:49, skipping insertion in model container [2020-09-04 12:59:49,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 12:59:49" (3/3) ... [2020-09-04 12:59:49,610 INFO L109 eAbstractionObserver]: Analyzing ICFG jain_4-2.c [2020-09-04 12:59:49,619 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 12:59:49,628 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 12:59:49,650 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 12:59:49,676 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 12:59:49,677 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 12:59:49,677 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 12:59:49,677 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 12:59:49,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 12:59:49,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 12:59:49,678 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 12:59:49,678 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 12:59:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-04 12:59:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 12:59:49,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:49,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:49,703 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash -13144129, now seen corresponding path program 1 times [2020-09-04 12:59:49,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:49,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650211971] [2020-09-04 12:59:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:50,053 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-09-04 12:59:50,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 12:59:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:50,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650211971] [2020-09-04 12:59:50,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 12:59:50,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 12:59:50,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143533704] [2020-09-04 12:59:50,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 12:59:50,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:50,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 12:59:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 12:59:50,139 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-09-04 12:59:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:50,243 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2020-09-04 12:59:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 12:59:50,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-04 12:59:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:50,260 INFO L225 Difference]: With dead ends: 33 [2020-09-04 12:59:50,261 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 12:59:50,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 12:59:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 12:59:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-09-04 12:59:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 12:59:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-04 12:59:50,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-09-04 12:59:50,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:50,309 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-04 12:59:50,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 12:59:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-04 12:59:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 12:59:50,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:50,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:50,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 12:59:50,312 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash 327764987, now seen corresponding path program 1 times [2020-09-04 12:59:50,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:50,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868649414] [2020-09-04 12:59:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:50,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 12:59:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 12:59:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:50,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868649414] [2020-09-04 12:59:50,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636077230] [2020-09-04 12:59:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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