/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:18:11,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:18:11,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:18:11,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:18:11,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:18:11,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:18:11,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:18:11,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:18:11,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:18:11,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:18:11,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:18:11,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:18:11,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:18:11,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:18:11,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:18:11,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:18:11,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:18:11,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:18:11,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:18:11,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:18:11,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:18:11,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:18:11,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:18:11,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:18:11,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:18:11,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:18:11,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:18:11,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:18:11,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:18:11,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:18:11,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:18:11,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:18:11,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:18:11,918 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:18:11,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:18:11,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:18:11,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:18:11,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:18:11,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:18:11,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:18:11,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:18:11,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:18:11,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:18:11,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:18:11,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:18:11,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:18:11,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:18:11,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:18:11,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:18:11,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:18:11,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:18:11,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:18:11,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:18:11,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:18:11,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:18:11,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:18:11,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:18:11,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:18:11,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:18:12,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:18:12,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:18:12,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:18:12,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:18:12,433 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:18:12,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-11-06 22:18:12,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35414cc5/ebc8a8eac5c54a61adb5e508f62ad638/FLAG404db6e52 [2020-11-06 22:18:13,215 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:18:13,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-11-06 22:18:13,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35414cc5/ebc8a8eac5c54a61adb5e508f62ad638/FLAG404db6e52 [2020-11-06 22:18:13,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35414cc5/ebc8a8eac5c54a61adb5e508f62ad638 [2020-11-06 22:18:13,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:18:13,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:18:13,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:18:13,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:18:13,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:18:13,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@227ca85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13, skipping insertion in model container [2020-11-06 22:18:13,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:18:13,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:18:13,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:18:13,881 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:18:13,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:18:13,920 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:18:13,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13 WrapperNode [2020-11-06 22:18:13,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:18:13,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:18:13,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:18:13,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:18:13,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... [2020-11-06 22:18:13,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:18:13,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:18:13,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:18:13,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:18:13,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:18:14,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:18:14,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:18:14,062 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:18:14,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-06 22:18:14,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:18:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:18:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:18:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:18:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:18:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:18:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-06 22:18:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:18:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:18:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:18:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:18:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:18:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:18:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:18:14,382 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:18:14,383 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:18:14,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:14 BoogieIcfgContainer [2020-11-06 22:18:14,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:18:14,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:18:14,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:18:14,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:18:14,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:13" (1/3) ... [2020-11-06 22:18:14,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191f4292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:14, skipping insertion in model container [2020-11-06 22:18:14,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:13" (2/3) ... [2020-11-06 22:18:14,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191f4292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:14, skipping insertion in model container [2020-11-06 22:18:14,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:14" (3/3) ... [2020-11-06 22:18:14,398 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-11-06 22:18:14,453 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:18:14,457 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:18:14,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:18:14,555 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:18:14,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:18:14,556 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:18:14,556 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:18:14,556 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:18:14,557 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:18:14,557 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:18:14,557 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:18:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-06 22:18:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:18:14,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:14,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:14,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:14,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1708859500, now seen corresponding path program 1 times [2020-11-06 22:18:14,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:14,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564130847] [2020-11-06 22:18:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:15,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:18:15,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564130847] [2020-11-06 22:18:15,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:18:15,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:18:15,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117623366] [2020-11-06 22:18:15,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:18:15,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:18:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:18:15,212 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-11-06 22:18:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:15,667 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-11-06 22:18:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:18:15,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:18:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:15,680 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:18:15,680 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:18:15,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:18:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:18:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:18:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:18:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-06 22:18:15,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-11-06 22:18:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:15,745 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-06 22:18:15,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:18:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-06 22:18:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:18:15,751 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:15,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:15,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:18:15,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2119969838, now seen corresponding path program 1 times [2020-11-06 22:18:15,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:15,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226703005] [2020-11-06 22:18:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:15,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:15,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:18:15,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226703005] [2020-11-06 22:18:15,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:18:15,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:18:15,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029430853] [2020-11-06 22:18:15,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:18:15,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:18:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:18:15,926 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-11-06 22:18:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:16,211 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-11-06 22:18:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:18:16,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:18:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:16,214 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:18:16,214 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:18:16,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:18:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:18:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-06 22:18:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:18:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-06 22:18:16,231 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-11-06 22:18:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:16,231 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-06 22:18:16,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:18:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-06 22:18:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:18:16,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:16,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:16,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:18:16,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash -308126725, now seen corresponding path program 1 times [2020-11-06 22:18:16,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358221881] [2020-11-06 22:18:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:16,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:16,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:16,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:18:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:18:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358221881] [2020-11-06 22:18:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684571622] [2020-11-06 22:18:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:18:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:18:16,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:16,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-11-06 22:18:16,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61745612] [2020-11-06 22:18:16,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:18:16,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:18:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:18:16,672 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2020-11-06 22:18:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:17,035 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-11-06 22:18:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:18:17,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-11-06 22:18:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:17,038 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:18:17,038 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:18:17,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:18:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:18:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-06 22:18:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:18:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-06 22:18:17,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 28 [2020-11-06 22:18:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:17,066 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-06 22:18:17,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:18:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-06 22:18:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:18:17,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:17,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:17,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:18:17,283 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1144313053, now seen corresponding path program 1 times [2020-11-06 22:18:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835645154] [2020-11-06 22:18:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:17,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:17,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:17,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:17,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:18:17,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835645154] [2020-11-06 22:18:17,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914082249] [2020-11-06 22:18:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:18:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:18:17,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:17,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:18:17,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460251595] [2020-11-06 22:18:17,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:18:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:18:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:18:17,675 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-11-06 22:18:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:18,062 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-11-06 22:18:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:18:18,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-11-06 22:18:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:18,065 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:18:18,065 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:18:18,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:18:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:18:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-06 22:18:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:18:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-11-06 22:18:18,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 29 [2020-11-06 22:18:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:18,082 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-11-06 22:18:18,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:18:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-11-06 22:18:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:18:18,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:18,085 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:18,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:18,294 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:18,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1249611306, now seen corresponding path program 2 times [2020-11-06 22:18:18,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:18,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806270887] [2020-11-06 22:18:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-06 22:18:18,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806270887] [2020-11-06 22:18:18,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561403743] [2020-11-06 22:18:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:18,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:18:18,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:18:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-06 22:18:18,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:18,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-06 22:18:18,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144118967] [2020-11-06 22:18:18,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:18:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:18,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:18:18,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:18:18,801 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 13 states. [2020-11-06 22:18:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:19,905 INFO L93 Difference]: Finished difference Result 75 states and 112 transitions. [2020-11-06 22:18:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:18:19,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-11-06 22:18:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:19,912 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:18:19,912 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:18:19,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:18:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:18:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-06 22:18:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-06 22:18:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-11-06 22:18:19,926 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 42 [2020-11-06 22:18:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:19,927 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-11-06 22:18:19,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:18:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-11-06 22:18:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-06 22:18:19,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:19,931 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:20,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:20,140 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1158728484, now seen corresponding path program 3 times [2020-11-06 22:18:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:20,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100293853] [2020-11-06 22:18:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-11-06 22:18:20,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100293853] [2020-11-06 22:18:20,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618965485] [2020-11-06 22:18:20,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:20,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-06 22:18:20,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:18:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-11-06 22:18:20,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:20,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-11-06 22:18:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724523638] [2020-11-06 22:18:20,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:18:20,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:20,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:18:20,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:18:20,800 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 14 states. [2020-11-06 22:18:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:22,057 INFO L93 Difference]: Finished difference Result 95 states and 139 transitions. [2020-11-06 22:18:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:18:22,058 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-11-06 22:18:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:22,062 INFO L225 Difference]: With dead ends: 95 [2020-11-06 22:18:22,062 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 22:18:22,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:18:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 22:18:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-06 22:18:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-06 22:18:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-11-06 22:18:22,082 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 98 [2020-11-06 22:18:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:22,083 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-11-06 22:18:22,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:18:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-11-06 22:18:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-06 22:18:22,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:22,088 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:22,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:22,302 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -73042607, now seen corresponding path program 4 times [2020-11-06 22:18:22,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:22,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637358699] [2020-11-06 22:18:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-11-06 22:18:22,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637358699] [2020-11-06 22:18:22,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393882528] [2020-11-06 22:18:22,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:22,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:18:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:18:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-06 22:18:23,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:23,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 17 [2020-11-06 22:18:23,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818827159] [2020-11-06 22:18:23,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:18:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:18:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:18:23,078 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 17 states. [2020-11-06 22:18:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:25,109 INFO L93 Difference]: Finished difference Result 130 states and 210 transitions. [2020-11-06 22:18:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:18:25,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 138 [2020-11-06 22:18:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:25,118 INFO L225 Difference]: With dead ends: 130 [2020-11-06 22:18:25,118 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:18:25,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=358, Invalid=1282, Unknown=0, NotChecked=0, Total=1640 [2020-11-06 22:18:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:18:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-11-06 22:18:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-06 22:18:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-11-06 22:18:25,157 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 138 [2020-11-06 22:18:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-11-06 22:18:25,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:18:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-11-06 22:18:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-06 22:18:25,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:25,161 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:25,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:18:25,367 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1296121057, now seen corresponding path program 5 times [2020-11-06 22:18:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:25,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093808714] [2020-11-06 22:18:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:25,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-11-06 22:18:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093808714] [2020-11-06 22:18:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395376594] [2020-11-06 22:18:26,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:26,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-06 22:18:26,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2020-11-06 22:18:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-11-06 22:18:26,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:26,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 21 [2020-11-06 22:18:26,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029437390] [2020-11-06 22:18:26,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:18:26,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:26,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:18:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:18:26,787 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 21 states. [2020-11-06 22:18:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:28,003 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-11-06 22:18:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:18:28,003 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-11-06 22:18:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:28,006 INFO L225 Difference]: With dead ends: 79 [2020-11-06 22:18:28,006 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:18:28,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:18:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:18:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-11-06 22:18:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-06 22:18:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-11-06 22:18:28,055 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 111 [2020-11-06 22:18:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:28,056 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-11-06 22:18:28,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:18:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-11-06 22:18:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-06 22:18:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:18:28,067 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:18:28,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:28,282 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:18:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:18:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash 885828711, now seen corresponding path program 6 times [2020-11-06 22:18:28,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:18:28,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857922551] [2020-11-06 22:18:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:18:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:18:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:18:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:18:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:18:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-06 22:18:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:18:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:18:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:18:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:18:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 225 proven. 175 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-11-06 22:18:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857922551] [2020-11-06 22:18:28,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671635863] [2020-11-06 22:18:28,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:28,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-06 22:18:28,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:18:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:18:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:18:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-11-06 22:18:28,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:18:28,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-11-06 22:18:28,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440609980] [2020-11-06 22:18:28,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:18:28,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:18:28,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:18:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:18:28,979 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 16 states. [2020-11-06 22:18:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:18:30,223 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2020-11-06 22:18:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:18:30,225 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 138 [2020-11-06 22:18:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:18:30,226 INFO L225 Difference]: With dead ends: 130 [2020-11-06 22:18:30,226 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:18:30,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-11-06 22:18:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:18:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:18:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:18:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:18:30,230 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2020-11-06 22:18:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:18:30,231 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:18:30,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:18:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:18:30,231 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:18:30,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:18:30,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:18:30,927 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 6 [2020-11-06 22:18:31,637 WARN L194 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 31 [2020-11-06 22:18:31,642 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:18:31,643 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:18:31,643 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:18:31,643 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:18:31,644 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:18:31,644 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:18:31,644 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:18:31,644 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:18:31,644 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:18:31,645 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:18:31,645 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:18:31,645 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 25 32) the Hoare annotation is: true [2020-11-06 22:18:31,645 INFO L262 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: false [2020-11-06 22:18:31,645 INFO L266 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-06 22:18:31,645 INFO L266 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-11-06 22:18:31,645 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-11-06 22:18:31,645 INFO L266 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-06 22:18:31,645 INFO L266 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-11-06 22:18:31,646 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 25 32) no Hoare annotation was computed. [2020-11-06 22:18:31,646 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 25 32) no Hoare annotation was computed. [2020-11-06 22:18:31,646 INFO L266 CegarLoopResult]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2020-11-06 22:18:31,646 INFO L266 CegarLoopResult]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2020-11-06 22:18:31,646 INFO L262 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo_#in~n|) (= fibo_~n |fibo_#in~n|)) [2020-11-06 22:18:31,646 INFO L266 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-06 22:18:31,646 INFO L262 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= |fibo_#t~ret7| 3) (<= 3 |fibo_#t~ret7|)) (<= |fibo_#in~n| 4) (<= 6 |fibo_#in~n|)) (let ((.cse0 (<= |fibo_#t~ret7| 1)) (.cse1 (<= 1 |fibo_#t~ret7|))) (or (<= 5 |fibo_#in~n|) (and .cse0 .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and (<= |fibo_#t~ret7| 2) (<= 2 |fibo_#t~ret7|) (<= 4 |fibo_#in~n|)) (and .cse0 (<= 2 |fibo_#in~n|) .cse1 (<= |fibo_#in~n| 2)))) (= fibo_~n |fibo_#in~n|)) [2020-11-06 22:18:31,646 INFO L266 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-11-06 22:18:31,647 INFO L266 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-11-06 22:18:31,647 INFO L266 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-11-06 22:18:31,647 INFO L269 CegarLoopResult]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2020-11-06 22:18:31,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:18:31 BoogieIcfgContainer [2020-11-06 22:18:31,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:18:31,655 INFO L168 Benchmark]: Toolchain (without parser) took 18061.75 ms. Allocated memory was 154.1 MB in the beginning and 338.7 MB in the end (delta: 184.5 MB). Free memory was 129.8 MB in the beginning and 307.4 MB in the end (delta: -177.6 MB). Peak memory consumption was 194.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:18:31,655 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:18:31,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.85 ms. Allocated memory is still 154.1 MB. Free memory was 129.2 MB in the beginning and 119.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:18:31,657 INFO L168 Benchmark]: Boogie Preprocessor took 38.68 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 118.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:18:31,657 INFO L168 Benchmark]: RCFGBuilder took 422.62 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 105.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:18:31,658 INFO L168 Benchmark]: TraceAbstraction took 17266.02 ms. Allocated memory was 154.1 MB in the beginning and 338.7 MB in the end (delta: 184.5 MB). Free memory was 105.2 MB in the beginning and 307.4 MB in the end (delta: -202.3 MB). Peak memory consumption was 170.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:18:31,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.85 ms. Allocated memory is still 154.1 MB. Free memory was 129.2 MB in the beginning and 119.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.68 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 118.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.62 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 105.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17266.02 ms. Allocated memory was 154.1 MB in the beginning and 338.7 MB in the end (delta: 184.5 MB). Free memory was 105.2 MB in the beginning and 307.4 MB in the end (delta: -202.3 MB). Peak memory consumption was 170.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.8s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 494 SDslu, 404 SDs, 0 SdLazy, 1952 SolverSat, 506 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 954 GetRequests, 752 SyntacticMatches, 9 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 141 PreInvPairs, 208 NumberOfFragments, 109 HoareAnnotationTreeSize, 141 FomulaSimplifications, 1865 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 10 FomulaSimplificationsInter, 3190 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1199 NumberOfCodeBlocks, 1145 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1183 ConstructedInterpolants, 0 QuantifiedInterpolants, 282577 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1572 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 4370/5870 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...