/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:25:49,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:25:49,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:25:49,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:25:49,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:25:49,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:25:49,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:25:49,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:25:49,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:25:49,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:25:49,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:25:49,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:25:49,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:25:49,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:25:49,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:25:49,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:25:49,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:25:49,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:25:49,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:25:49,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:25:49,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:25:49,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:25:49,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:25:49,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:25:49,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:25:49,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:25:49,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:25:49,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:25:49,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:25:49,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:25:49,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:25:49,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:25:49,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:25:49,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:25:49,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:25:49,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:25:49,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:25:49,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:25:49,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:25:49,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:25:49,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:25:49,740 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:25:49,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:25:49,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:25:49,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:25:49,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:25:49,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:25:49,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:25:49,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:25:49,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:25:49,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:25:49,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:25:49,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:25:49,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:25:49,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:25:49,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:25:49,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:25:49,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:25:49,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:25:49,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:25:49,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:25:49,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:25:49,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:25:50,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:25:50,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:25:50,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:25:50,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:25:50,236 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:25:50,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2020-12-23 09:25:50,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/663f920a1/e857cdbcdb0b43e593c9fe75c1c46e91/FLAG2188a8f6c [2020-12-23 09:25:51,028 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:25:51,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2020-12-23 09:25:51,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/663f920a1/e857cdbcdb0b43e593c9fe75c1c46e91/FLAG2188a8f6c [2020-12-23 09:25:51,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/663f920a1/e857cdbcdb0b43e593c9fe75c1c46e91 [2020-12-23 09:25:51,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:25:51,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:25:51,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:25:51,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:25:51,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:25:51,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373320b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51, skipping insertion in model container [2020-12-23 09:25:51,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:25:51,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:25:51,287 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2020-12-23 09:25:51,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:25:51,306 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:25:51,329 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2020-12-23 09:25:51,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:25:51,347 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:25:51,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51 WrapperNode [2020-12-23 09:25:51,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:25:51,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:25:51,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:25:51,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:25:51,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:25:51,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:25:51,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:25:51,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:25:51,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... [2020-12-23 09:25:51,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:25:51,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:25:51,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:25:51,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:25:51,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:25:51,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:25:51,520 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-12-23 09:25:51,521 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-12-23 09:25:51,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:25:51,521 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-12-23 09:25:51,521 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-12-23 09:25:51,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:25:51,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:25:51,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:25:51,818 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:25:51,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:51 BoogieIcfgContainer [2020-12-23 09:25:51,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:25:51,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:25:51,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:25:51,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:25:51,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:25:51" (1/3) ... [2020-12-23 09:25:51,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbc53f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:25:51, skipping insertion in model container [2020-12-23 09:25:51,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:51" (2/3) ... [2020-12-23 09:25:51,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbc53f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:25:51, skipping insertion in model container [2020-12-23 09:25:51,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:51" (3/3) ... [2020-12-23 09:25:51,833 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-12-23 09:25:51,841 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:25:51,848 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:25:51,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:25:51,917 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:25:51,918 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:25:51,918 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:25:51,918 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:25:51,918 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:25:51,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:25:51,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:25:51,919 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:25:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-23 09:25:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:25:51,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:51,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:51,945 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2020-12-23 09:25:51,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:51,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99182908] [2020-12-23 09:25:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:25:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99182908] [2020-12-23 09:25:52,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:25:52,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:25:52,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002036483] [2020-12-23 09:25:52,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:25:52,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:25:52,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:25:52,258 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-12-23 09:25:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:52,385 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-23 09:25:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:25:52,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:25:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:52,398 INFO L225 Difference]: With dead ends: 39 [2020-12-23 09:25:52,399 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:25:52,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:25:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:25:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:25:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:25:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 09:25:52,453 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-12-23 09:25:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:52,454 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 09:25:52,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:25:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 09:25:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:25:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:52,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:52,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:25:52,457 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2020-12-23 09:25:52,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:52,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891903911] [2020-12-23 09:25:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:25:52,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891903911] [2020-12-23 09:25:52,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:25:52,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:25:52,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073948551] [2020-12-23 09:25:52,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:25:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:25:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:25:52,539 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-12-23 09:25:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:52,621 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-23 09:25:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:25:52,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 09:25:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:52,624 INFO L225 Difference]: With dead ends: 33 [2020-12-23 09:25:52,624 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 09:25:52,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:25:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 09:25:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-23 09:25:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:25:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 09:25:52,635 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-12-23 09:25:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:52,636 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 09:25:52,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:25:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 09:25:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 09:25:52,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:52,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:52,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:25:52,639 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:52,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2020-12-23 09:25:52,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:52,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343969972] [2020-12-23 09:25:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:25:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:52,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343969972] [2020-12-23 09:25:52,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195853789] [2020-12-23 09:25:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:53,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:53,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-12-23 09:25:53,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454841710] [2020-12-23 09:25:53,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:25:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:25:53,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:25:53,143 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-12-23 09:25:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:53,450 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-12-23 09:25:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:25:53,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 09:25:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:53,453 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:25:53,453 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 09:25:53,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:25:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 09:25:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 09:25:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 09:25:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 09:25:53,464 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-12-23 09:25:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:53,465 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 09:25:53,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:25:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 09:25:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 09:25:53,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:53,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:53,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:25:53,701 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2020-12-23 09:25:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:53,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201856993] [2020-12-23 09:25:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:53,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:53,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201856993] [2020-12-23 09:25:53,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442820888] [2020-12-23 09:25:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:54,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:54,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:54,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-23 09:25:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918612296] [2020-12-23 09:25:54,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:25:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:25:54,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:25:54,179 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2020-12-23 09:25:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:54,499 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-12-23 09:25:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:25:54,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-23 09:25:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:54,505 INFO L225 Difference]: With dead ends: 51 [2020-12-23 09:25:54,505 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 09:25:54,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:25:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 09:25:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-23 09:25:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:25:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-12-23 09:25:54,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-12-23 09:25:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:54,521 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-12-23 09:25:54,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:25:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-12-23 09:25:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 09:25:54,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:54,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:54,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:54,739 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:54,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2020-12-23 09:25:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:54,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276330667] [2020-12-23 09:25:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:25:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 09:25:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:25:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276330667] [2020-12-23 09:25:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560848112] [2020-12-23 09:25:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:25:55,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:55,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-12-23 09:25:55,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456823868] [2020-12-23 09:25:55,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:25:55,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:55,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:25:55,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:25:55,091 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-12-23 09:25:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:55,378 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-12-23 09:25:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:25:55,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 09:25:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:55,396 INFO L225 Difference]: With dead ends: 105 [2020-12-23 09:25:55,398 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 09:25:55,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:25:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 09:25:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 09:25:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:25:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-12-23 09:25:55,421 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-12-23 09:25:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:55,421 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-12-23 09:25:55,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:25:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-12-23 09:25:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 09:25:55,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:55,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:55,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:55,639 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2020-12-23 09:25:55,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:55,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665623181] [2020-12-23 09:25:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 09:25:55,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665623181] [2020-12-23 09:25:55,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449918578] [2020-12-23 09:25:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:25:55,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:55,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 09:25:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968749229] [2020-12-23 09:25:55,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:25:55,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:25:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:25:55,962 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 14 states. [2020-12-23 09:25:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:56,337 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-12-23 09:25:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:25:56,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-23 09:25:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:56,341 INFO L225 Difference]: With dead ends: 177 [2020-12-23 09:25:56,341 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 09:25:56,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:25:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 09:25:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-12-23 09:25:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 09:25:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-12-23 09:25:56,397 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-12-23 09:25:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:56,398 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-12-23 09:25:56,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:25:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-12-23 09:25:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 09:25:56,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:56,410 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:56,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:56,628 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2020-12-23 09:25:56,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:56,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584216403] [2020-12-23 09:25:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-23 09:25:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 09:25:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584216403] [2020-12-23 09:25:56,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566028158] [2020-12-23 09:25:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:25:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 09:25:57,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:57,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 09:25:57,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105713115] [2020-12-23 09:25:57,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:25:57,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:57,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:25:57,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:25:57,033 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 15 states. [2020-12-23 09:25:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:57,503 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-12-23 09:25:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:25:57,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-12-23 09:25:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:57,508 INFO L225 Difference]: With dead ends: 255 [2020-12-23 09:25:57,508 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 09:25:57,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:25:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 09:25:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-12-23 09:25:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 09:25:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-12-23 09:25:57,557 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-12-23 09:25:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:57,559 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-12-23 09:25:57,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:25:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-12-23 09:25:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 09:25:57,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:57,573 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:57,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 09:25:57,774 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2020-12-23 09:25:57,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:57,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123624581] [2020-12-23 09:25:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-23 09:25:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-23 09:25:58,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123624581] [2020-12-23 09:25:58,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107727477] [2020-12-23 09:25:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-23 09:25:58,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:58,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-12-23 09:25:58,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534576515] [2020-12-23 09:25:58,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:25:58,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:25:58,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:25:58,375 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 16 states. [2020-12-23 09:25:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:58,781 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2020-12-23 09:25:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 09:25:58,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-12-23 09:25:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:58,784 INFO L225 Difference]: With dead ends: 241 [2020-12-23 09:25:58,784 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 09:25:58,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:25:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 09:25:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2020-12-23 09:25:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 09:25:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2020-12-23 09:25:58,807 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 93 [2020-12-23 09:25:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:58,809 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2020-12-23 09:25:58,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:25:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2020-12-23 09:25:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:25:58,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:58,815 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:59,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:59,023 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash -482868633, now seen corresponding path program 1 times [2020-12-23 09:25:59,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:59,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365662051] [2020-12-23 09:25:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-12-23 09:25:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 61 proven. 93 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-23 09:25:59,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365662051] [2020-12-23 09:25:59,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684669075] [2020-12-23 09:25:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:25:59,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 76 proven. 59 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-23 09:25:59,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:59,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2020-12-23 09:25:59,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861341185] [2020-12-23 09:25:59,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:25:59,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:25:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:25:59,656 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand 21 states. [2020-12-23 09:26:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:00,214 INFO L93 Difference]: Finished difference Result 250 states and 477 transitions. [2020-12-23 09:26:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 09:26:00,215 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-12-23 09:26:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:00,217 INFO L225 Difference]: With dead ends: 250 [2020-12-23 09:26:00,218 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 09:26:00,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:26:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 09:26:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-12-23 09:26:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 09:26:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2020-12-23 09:26:00,237 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 106 [2020-12-23 09:26:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:00,237 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2020-12-23 09:26:00,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:26:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2020-12-23 09:26:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 09:26:00,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:00,246 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:00,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:00,447 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1154581566, now seen corresponding path program 2 times [2020-12-23 09:26:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:00,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217062548] [2020-12-23 09:26:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 108 proven. 97 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-23 09:26:00,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217062548] [2020-12-23 09:26:00,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122496912] [2020-12-23 09:26:00,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:00,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:00,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:26:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 112 proven. 24 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-23 09:26:01,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:01,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 25 [2020-12-23 09:26:01,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204743729] [2020-12-23 09:26:01,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 09:26:01,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:01,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 09:26:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:26:01,186 INFO L87 Difference]: Start difference. First operand 108 states and 151 transitions. Second operand 25 states. [2020-12-23 09:26:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:01,740 INFO L93 Difference]: Finished difference Result 224 states and 341 transitions. [2020-12-23 09:26:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 09:26:01,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2020-12-23 09:26:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:01,743 INFO L225 Difference]: With dead ends: 224 [2020-12-23 09:26:01,744 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 09:26:01,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:26:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 09:26:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2020-12-23 09:26:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 09:26:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-12-23 09:26:01,762 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 119 [2020-12-23 09:26:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:01,763 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-12-23 09:26:01,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 09:26:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-12-23 09:26:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:26:01,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:01,766 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:01,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 09:26:01,980 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 3 times [2020-12-23 09:26:01,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:01,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926455394] [2020-12-23 09:26:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-12-23 09:26:02,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926455394] [2020-12-23 09:26:02,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260653700] [2020-12-23 09:26:02,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:02,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 09:26:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 09:26:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-12-23 09:26:03,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:03,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-12-23 09:26:03,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100657585] [2020-12-23 09:26:03,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 09:26:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 09:26:03,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:26:03,130 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 28 states. [2020-12-23 09:26:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:03,360 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2020-12-23 09:26:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 09:26:03,361 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-23 09:26:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:03,363 INFO L225 Difference]: With dead ends: 108 [2020-12-23 09:26:03,363 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 09:26:03,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 133 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:26:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 09:26:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-12-23 09:26:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 09:26:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2020-12-23 09:26:03,374 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 106 [2020-12-23 09:26:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:03,375 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2020-12-23 09:26:03,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 09:26:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2020-12-23 09:26:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 09:26:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:03,377 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:03,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:03,591 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 4 times [2020-12-23 09:26:03,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:03,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141226831] [2020-12-23 09:26:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 09:26:03,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141226831] [2020-12-23 09:26:03,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771284649] [2020-12-23 09:26:03,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:03,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-23 09:26:03,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:03,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2020-12-23 09:26:03,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23720711] [2020-12-23 09:26:03,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:26:03,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:26:03,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:26:03,987 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand 16 states. [2020-12-23 09:26:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:04,214 INFO L93 Difference]: Finished difference Result 200 states and 261 transitions. [2020-12-23 09:26:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:26:04,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-12-23 09:26:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:04,216 INFO L225 Difference]: With dead ends: 200 [2020-12-23 09:26:04,216 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 09:26:04,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 09:26:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-12-23 09:26:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 09:26:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2020-12-23 09:26:04,228 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 92 [2020-12-23 09:26:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:04,228 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2020-12-23 09:26:04,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:26:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2020-12-23 09:26:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 09:26:04,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:04,230 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:04,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:04,444 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1910877440, now seen corresponding path program 1 times [2020-12-23 09:26:04,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:04,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683947070] [2020-12-23 09:26:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-23 09:26:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-12-23 09:26:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-12-23 09:26:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683947070] [2020-12-23 09:26:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382950995] [2020-12-23 09:26:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:26:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-23 09:26:05,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:05,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2020-12-23 09:26:05,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949815086] [2020-12-23 09:26:05,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:26:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:26:05,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:26:05,009 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 18 states. [2020-12-23 09:26:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:05,287 INFO L93 Difference]: Finished difference Result 203 states and 260 transitions. [2020-12-23 09:26:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:26:05,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-12-23 09:26:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:05,288 INFO L225 Difference]: With dead ends: 203 [2020-12-23 09:26:05,289 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:26:05,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:26:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:26:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:26:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:26:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:26:05,291 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2020-12-23 09:26:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:05,292 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:26:05,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:26:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:26:05,292 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:26:05,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:26:05,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:26:06,175 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 20 [2020-12-23 09:26:06,556 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 22 [2020-12-23 09:26:06,612 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:26:06,612 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:26:06,612 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:26:06,612 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:26:06,612 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2020-12-23 09:26:06,613 INFO L185 CegarLoopUtils]: At program point L43(lines 37 44) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2020-12-23 09:26:06,613 INFO L189 CegarLoopUtils]: For program point L41(line 41) no Hoare annotation was computed. [2020-12-23 09:26:06,613 INFO L189 CegarLoopUtils]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-12-23 09:26:06,613 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2020-12-23 09:26:06,613 INFO L189 CegarLoopUtils]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-12-23 09:26:06,613 INFO L189 CegarLoopUtils]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-12-23 09:26:06,614 INFO L192 CegarLoopUtils]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-12-23 09:26:06,614 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-12-23 09:26:06,614 INFO L189 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-23 09:26:06,614 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (let ((.cse0 (<= |fibo2_#t~ret9| 1)) (.cse1 (<= 1 |fibo2_#t~ret9|))) (or (and .cse0 (< 1 fibo2_~n) .cse1 (<= |fibo2_#in~n| 2)) (and (<= fibo2_~n 3) (<= 3 fibo2_~n) .cse0 .cse1) (not (<= |fibo2_#in~n| 4))))) [2020-12-23 09:26:06,614 INFO L189 CegarLoopUtils]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-12-23 09:26:06,614 INFO L189 CegarLoopUtils]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-12-23 09:26:06,615 INFO L189 CegarLoopUtils]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-12-23 09:26:06,615 INFO L189 CegarLoopUtils]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-12-23 09:26:06,615 INFO L189 CegarLoopUtils]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-12-23 09:26:06,615 INFO L192 CegarLoopUtils]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-12-23 09:26:06,615 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-12-23 09:26:06,615 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-12-23 09:26:06,616 INFO L185 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse1 (<= 4 |fibo1_#in~n|)) (.cse0 (= fibo1_~n |fibo1_#in~n|)) (.cse2 (<= |fibo1_#in~n| 4))) (or (and .cse0 (<= 6 |fibo1_#in~n|)) (and (<= 3 |fibo1_#t~ret7|) .cse1 .cse0 (<= |fibo1_#t~ret7| 3)) (and (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1) .cse0 .cse2) (and .cse1 .cse0 .cse2))) (< 1 fibo1_~n)) [2020-12-23 09:26:06,616 INFO L189 CegarLoopUtils]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-12-23 09:26:06,616 INFO L189 CegarLoopUtils]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-12-23 09:26:06,616 INFO L189 CegarLoopUtils]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-12-23 09:26:06,616 INFO L189 CegarLoopUtils]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-12-23 09:26:06,616 INFO L189 CegarLoopUtils]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-12-23 09:26:06,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:26:06 BoogieIcfgContainer [2020-12-23 09:26:06,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:26:06,649 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:26:06,649 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:26:06,650 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:26:06,650 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:51" (3/4) ... [2020-12-23 09:26:06,654 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:26:06,662 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-12-23 09:26:06,662 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-12-23 09:26:06,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:26:06,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:26:06,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:26:06,668 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:26:06,715 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/fibo_2calls_5-1.c-witness.graphml [2020-12-23 09:26:06,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:26:06,716 INFO L168 Benchmark]: Toolchain (without parser) took 15656.12 ms. Allocated memory was 156.2 MB in the beginning and 361.8 MB in the end (delta: 205.5 MB). Free memory was 130.5 MB in the beginning and 340.8 MB in the end (delta: -210.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:26:06,717 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:26:06,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.62 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 120.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:06,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 119.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:06,722 INFO L168 Benchmark]: Boogie Preprocessor took 20.99 ms. Allocated memory is still 156.2 MB. Free memory was 119.4 MB in the beginning and 118.5 MB in the end (delta: 915.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:06,722 INFO L168 Benchmark]: RCFGBuilder took 414.49 ms. Allocated memory is still 156.2 MB. Free memory was 118.5 MB in the beginning and 105.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:06,725 INFO L168 Benchmark]: TraceAbstraction took 14825.20 ms. Allocated memory was 156.2 MB in the beginning and 361.8 MB in the end (delta: 205.5 MB). Free memory was 105.2 MB in the beginning and 343.4 MB in the end (delta: -238.3 MB). Peak memory consumption was 181.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:06,726 INFO L168 Benchmark]: Witness Printer took 65.97 ms. Allocated memory is still 361.8 MB. Free memory was 343.4 MB in the beginning and 340.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:06,733 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.62 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 120.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 119.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.99 ms. Allocated memory is still 156.2 MB. Free memory was 119.4 MB in the beginning and 118.5 MB in the end (delta: 915.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 414.49 ms. Allocated memory is still 156.2 MB. Free memory was 118.5 MB in the beginning and 105.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14825.20 ms. Allocated memory was 156.2 MB in the beginning and 361.8 MB in the end (delta: 205.5 MB). Free memory was 105.2 MB in the beginning and 343.4 MB in the end (delta: -238.3 MB). Peak memory consumption was 181.3 MB. Max. memory is 8.0 GB. * Witness Printer took 65.97 ms. Allocated memory is still 361.8 MB. Free memory was 343.4 MB in the beginning and 340.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 371 SDtfs, 576 SDslu, 2969 SDs, 0 SdLazy, 3722 SolverSat, 591 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1276 GetRequests, 1020 SyntacticMatches, 11 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 144 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 494 PreInvPairs, 736 NumberOfFragments, 109 HoareAnnotationTreeSize, 494 FomulaSimplifications, 5755 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3306 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 1635 NumberOfCodeBlocks, 1621 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1611 ConstructedInterpolants, 0 QuantifiedInterpolants, 318481 SizeOfPredicates, 46 NumberOfNonLiveVariables, 2039 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 2535/3416 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...