/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_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:14:13,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:14:13,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:14:13,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:14:13,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:14:13,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:14:13,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:14:13,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:14:13,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:14:13,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:14:13,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:14:13,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:14:13,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:14:13,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:14:13,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:14:13,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:14:13,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:14:13,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:14:13,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:14:13,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:14:13,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:14:13,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:14:13,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:14:13,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:14:13,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:14:13,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:14:13,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:14:13,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:14:13,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:14:13,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:14:13,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:14:13,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:14:13,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:14:13,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:14:13,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:14:13,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:14:13,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:14:13,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:14:13,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:14:13,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:14:13,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:14:13,832 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 [2020-10-23 18:14:13,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:14:13,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:14:13,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:14:13,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:14:13,863 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:14:13,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:14:13,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:14:13,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:14:13,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:14:13,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:14:13,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:14:13,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:14:13,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:14:13,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:14:13,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:14:13,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:14:13,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:14:13,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:14:13,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:14:13,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:14:13,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:14:13,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:14:13,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:14:13,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:14:13,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:14:13,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:14:13,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:14:13,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:14:13,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:14:13,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:14:14,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:14:14,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:14:14,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:14:14,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:14:14,319 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:14:14,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-10-23 18:14:14,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19b26625/38ba5373d2a54827b782e8f8dc8de17a/FLAGf728a63b0 [2020-10-23 18:14:15,056 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:14:15,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-10-23 18:14:15,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19b26625/38ba5373d2a54827b782e8f8dc8de17a/FLAGf728a63b0 [2020-10-23 18:14:15,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19b26625/38ba5373d2a54827b782e8f8dc8de17a [2020-10-23 18:14:15,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:14:15,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:14:15,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:14:15,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:14:15,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:14:15,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1681f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15, skipping insertion in model container [2020-10-23 18:14:15,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:14:15,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:14:15,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:14:15,346 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:14:15,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:14:15,393 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:14:15,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15 WrapperNode [2020-10-23 18:14:15,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:14:15,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:14:15,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:14:15,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:14:15,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (1/1) ... [2020-10-23 18:14:15,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:14:15,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:14:15,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:14:15,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:14:15,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (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 [2020-10-23 18:14:15,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:14:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:14:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:14:15,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 18:14:15,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 18:14:15,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:14:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:14:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:14:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:14:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:14:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:14:15,546 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 18:14:15,546 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 18:14:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:14:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:14:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:14:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:14:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:14:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:14:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:14:15,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:14:15,898 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:14:15,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:14:15 BoogieIcfgContainer [2020-10-23 18:14:15,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:14:15,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:14:15,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:14:15,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:14:15,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:14:15" (1/3) ... [2020-10-23 18:14:15,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bde9dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:14:15, skipping insertion in model container [2020-10-23 18:14:15,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:15" (2/3) ... [2020-10-23 18:14:15,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bde9dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:14:15, skipping insertion in model container [2020-10-23 18:14:15,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:14:15" (3/3) ... [2020-10-23 18:14:15,935 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-10-23 18:14:15,949 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:14:15,955 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:14:15,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:14:16,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:14:16,004 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:14:16,005 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:14:16,005 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:14:16,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:14:16,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:14:16,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:14:16,006 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:14:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:14:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:14:16,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:16,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:16,041 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 219823047, now seen corresponding path program 1 times [2020-10-23 18:14:16,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:16,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133857525] [2020-10-23 18:14:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:14:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133857525] [2020-10-23 18:14:16,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:14:16,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:14:16,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662860258] [2020-10-23 18:14:16,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:14:16,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:14:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:14:16,528 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-23 18:14:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:16,920 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-23 18:14:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:14:16,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:14:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:16,934 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:14:16,935 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:14:16,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:14:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:14:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:14:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:14:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:14:16,996 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-10-23 18:14:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:16,997 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:14:16,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:14:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:14:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:14:16,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:16,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:17,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:14:17,000 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1220716726, now seen corresponding path program 1 times [2020-10-23 18:14:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:17,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214079286] [2020-10-23 18:14:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:14:17,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214079286] [2020-10-23 18:14:17,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:14:17,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:14:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630381802] [2020-10-23 18:14:17,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:14:17,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:14:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:14:17,131 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-23 18:14:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:17,409 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-23 18:14:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:14:17,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:14:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:17,412 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:14:17,412 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:14:17,414 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 [2020-10-23 18:14:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:14:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:14:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:14:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:14:17,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2020-10-23 18:14:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:17,427 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:14:17,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:14:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:14:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:14:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:17,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:17,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:14:17,430 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2083135015, now seen corresponding path program 1 times [2020-10-23 18:14:17,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:17,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510264443] [2020-10-23 18:14:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:14:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:17,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510264443] [2020-10-23 18:14:17,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830551355] [2020-10-23 18:14:17,585 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 [2020-10-23 18:14:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:14:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:17,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:17,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-23 18:14:17,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675323928] [2020-10-23 18:14:17,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:14:17,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:14:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:14:17,829 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-10-23 18:14:18,358 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:14:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:18,653 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-10-23 18:14:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:14:18,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-23 18:14:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:18,656 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:14:18,656 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:14:18,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:14:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:14:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-23 18:14:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:14:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-23 18:14:18,671 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2020-10-23 18:14:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:18,672 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-23 18:14:18,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:14:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-23 18:14:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:14:18,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:18,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:18,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:14:18,890 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash 752879968, now seen corresponding path program 1 times [2020-10-23 18:14:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:18,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746949277] [2020-10-23 18:14:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:18,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:18,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:19,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:19,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:19,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746949277] [2020-10-23 18:14:19,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005355531] [2020-10-23 18:14:19,061 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 [2020-10-23 18:14:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:14:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:19,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:19,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-10-23 18:14:19,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553649328] [2020-10-23 18:14:19,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:14:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:19,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:14:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:14:19,200 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2020-10-23 18:14:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:19,819 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-23 18:14:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:14:19,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-23 18:14:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:19,823 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:14:19,823 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 18:14:19,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:14:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 18:14:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-23 18:14:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:14:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2020-10-23 18:14:19,840 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 29 [2020-10-23 18:14:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:19,841 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2020-10-23 18:14:19,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:14:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2020-10-23 18:14:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:14:19,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:19,844 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:20,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:20,060 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2070859795, now seen corresponding path program 1 times [2020-10-23 18:14:20,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:20,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422169599] [2020-10-23 18:14:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:14:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:14:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:14:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422169599] [2020-10-23 18:14:20,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788836736] [2020-10-23 18:14:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 18:14:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:14:20,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:20,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-10-23 18:14:20,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854363620] [2020-10-23 18:14:20,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:14:20,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:14:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:14:20,508 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand 12 states. [2020-10-23 18:14:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:21,510 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2020-10-23 18:14:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:14:21,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-23 18:14:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:21,519 INFO L225 Difference]: With dead ends: 111 [2020-10-23 18:14:21,520 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:14:21,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:14:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:14:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:14:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:14:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2020-10-23 18:14:21,547 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 41 [2020-10-23 18:14:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:21,548 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2020-10-23 18:14:21,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:14:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2020-10-23 18:14:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:14:21,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:21,551 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:21,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:21,754 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1960607334, now seen corresponding path program 1 times [2020-10-23 18:14:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:21,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994325232] [2020-10-23 18:14:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 18:14:21,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994325232] [2020-10-23 18:14:21,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108620721] [2020-10-23 18:14:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 18:14:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:14:22,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:22,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-23 18:14:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92469046] [2020-10-23 18:14:22,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:14:22,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:14:22,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:14:22,136 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand 14 states. [2020-10-23 18:14:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:23,648 INFO L93 Difference]: Finished difference Result 183 states and 327 transitions. [2020-10-23 18:14:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:14:23,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-23 18:14:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:23,655 INFO L225 Difference]: With dead ends: 183 [2020-10-23 18:14:23,656 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 18:14:23,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:14:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 18:14:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-10-23 18:14:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 18:14:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 171 transitions. [2020-10-23 18:14:23,689 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 171 transitions. Word has length 42 [2020-10-23 18:14:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:23,690 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 171 transitions. [2020-10-23 18:14:23,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:14:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 171 transitions. [2020-10-23 18:14:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-23 18:14:23,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:23,695 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:23,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:23,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash -751460799, now seen corresponding path program 1 times [2020-10-23 18:14:23,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:23,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092440138] [2020-10-23 18:14:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:23,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:23,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:14:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-23 18:14:24,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092440138] [2020-10-23 18:14:24,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741294798] [2020-10-23 18:14:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 18:14:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:14:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-23 18:14:24,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:24,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-10-23 18:14:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100327432] [2020-10-23 18:14:24,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:14:24,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:14:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:14:24,384 INFO L87 Difference]: Start difference. First operand 108 states and 171 transitions. Second operand 15 states. [2020-10-23 18:14:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:26,124 INFO L93 Difference]: Finished difference Result 261 states and 501 transitions. [2020-10-23 18:14:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:14:26,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-23 18:14:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:26,129 INFO L225 Difference]: With dead ends: 261 [2020-10-23 18:14:26,130 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 18:14:26,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:14:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 18:14:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2020-10-23 18:14:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 18:14:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 182 transitions. [2020-10-23 18:14:26,171 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 182 transitions. Word has length 56 [2020-10-23 18:14:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:26,172 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 182 transitions. [2020-10-23 18:14:26,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:14:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 182 transitions. [2020-10-23 18:14:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-23 18:14:26,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:26,179 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:26,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:14:26,391 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2107233529, now seen corresponding path program 1 times [2020-10-23 18:14:26,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:26,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625117444] [2020-10-23 18:14:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-23 18:14:26,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625117444] [2020-10-23 18:14:26,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530949522] [2020-10-23 18:14:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 18:14:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:14:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-23 18:14:27,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:27,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-23 18:14:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141246127] [2020-10-23 18:14:27,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:14:27,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:14:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:14:27,033 INFO L87 Difference]: Start difference. First operand 114 states and 182 transitions. Second operand 17 states. [2020-10-23 18:14:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:29,124 INFO L93 Difference]: Finished difference Result 246 states and 468 transitions. [2020-10-23 18:14:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 18:14:29,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-23 18:14:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:29,131 INFO L225 Difference]: With dead ends: 246 [2020-10-23 18:14:29,131 INFO L226 Difference]: Without dead ends: 112 [2020-10-23 18:14:29,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:14:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-23 18:14:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 89. [2020-10-23 18:14:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 18:14:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2020-10-23 18:14:29,183 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 112 [2020-10-23 18:14:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:29,183 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2020-10-23 18:14:29,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:14:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2020-10-23 18:14:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-23 18:14:29,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:29,195 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 12, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:29,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:29,407 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash 993046157, now seen corresponding path program 1 times [2020-10-23 18:14:29,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:29,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931077294] [2020-10-23 18:14:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-23 18:14:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 76 proven. 208 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2020-10-23 18:14:29,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931077294] [2020-10-23 18:14:29,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060693795] [2020-10-23 18:14:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:14:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 63 proven. 180 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-10-23 18:14:30,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:30,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2020-10-23 18:14:30,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45244031] [2020-10-23 18:14:30,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:14:30,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:14:30,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:14:30,287 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand 16 states. [2020-10-23 18:14:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:31,927 INFO L93 Difference]: Finished difference Result 175 states and 254 transitions. [2020-10-23 18:14:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:14:31,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 194 [2020-10-23 18:14:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:31,934 INFO L225 Difference]: With dead ends: 175 [2020-10-23 18:14:31,935 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 18:14:31,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:14:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 18:14:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-10-23 18:14:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:14:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2020-10-23 18:14:31,958 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 194 [2020-10-23 18:14:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:31,959 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2020-10-23 18:14:31,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:14:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2020-10-23 18:14:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-23 18:14:31,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:31,962 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:32,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:32,178 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash -237806758, now seen corresponding path program 2 times [2020-10-23 18:14:32,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:32,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193062253] [2020-10-23 18:14:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 18:14:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-23 18:14:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:14:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 181 proven. 164 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-10-23 18:14:32,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193062253] [2020-10-23 18:14:32,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22146664] [2020-10-23 18:14:32,747 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:14:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:14:32,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 84 proven. 157 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2020-10-23 18:14:33,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:33,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 21 [2020-10-23 18:14:33,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724364546] [2020-10-23 18:14:33,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:14:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:14:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:14:33,052 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand 21 states. [2020-10-23 18:14:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:35,692 INFO L93 Difference]: Finished difference Result 212 states and 348 transitions. [2020-10-23 18:14:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-23 18:14:35,693 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 167 [2020-10-23 18:14:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:35,696 INFO L225 Difference]: With dead ends: 212 [2020-10-23 18:14:35,696 INFO L226 Difference]: Without dead ends: 102 [2020-10-23 18:14:35,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 18:14:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-23 18:14:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-23 18:14:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-23 18:14:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2020-10-23 18:14:35,712 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 167 [2020-10-23 18:14:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:35,713 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2020-10-23 18:14:35,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:14:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2020-10-23 18:14:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-23 18:14:35,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:35,716 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:35,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:14:35,931 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash -695303513, now seen corresponding path program 3 times [2020-10-23 18:14:35,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:35,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135178439] [2020-10-23 18:14:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:36,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-23 18:14:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-10-23 18:14:37,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135178439] [2020-10-23 18:14:37,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156396177] [2020-10-23 18:14:37,262 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:37,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-23 18:14:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 103 conjunts are in the unsatisfiable core [2020-10-23 18:14:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-10-23 18:14:38,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:38,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 37 [2020-10-23 18:14:38,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378517267] [2020-10-23 18:14:38,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 18:14:38,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 18:14:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:14:38,458 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand 37 states. [2020-10-23 18:14:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:41,493 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-23 18:14:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-23 18:14:41,494 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 179 [2020-10-23 18:14:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:41,496 INFO L225 Difference]: With dead ends: 122 [2020-10-23 18:14:41,496 INFO L226 Difference]: Without dead ends: 94 [2020-10-23 18:14:41,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 235 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=215, Invalid=3691, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 18:14:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-23 18:14:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-23 18:14:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 18:14:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-10-23 18:14:41,522 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 179 [2020-10-23 18:14:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:41,523 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-10-23 18:14:41,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 18:14:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-10-23 18:14:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-23 18:14:41,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:41,528 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:41,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:41,742 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:41,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1578906910, now seen corresponding path program 4 times [2020-10-23 18:14:41,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:41,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942767595] [2020-10-23 18:14:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:41,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:41,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:41,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-23 18:14:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-10-23 18:14:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 153 proven. 211 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2020-10-23 18:14:42,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942767595] [2020-10-23 18:14:42,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62128845] [2020-10-23 18:14:42,332 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:42,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:14:42,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:14:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 101 proven. 320 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2020-10-23 18:14:42,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:42,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-23 18:14:42,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171325255] [2020-10-23 18:14:42,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:14:42,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:14:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:14:42,675 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 20 states. [2020-10-23 18:14:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:43,970 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2020-10-23 18:14:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:14:43,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 206 [2020-10-23 18:14:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:43,972 INFO L225 Difference]: With dead ends: 150 [2020-10-23 18:14:43,973 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:14:43,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:14:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:14:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:14:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:14:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:14:43,974 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 206 [2020-10-23 18:14:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:43,975 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:14:43,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:14:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:14:43,975 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:14:44,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:44,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:14:45,913 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 26 [2020-10-23 18:14:46,682 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 35 [2020-10-23 18:14:46,942 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 6 [2020-10-23 18:14:47,121 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 7 [2020-10-23 18:14:47,224 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:14:47,224 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:14:47,224 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:14:47,224 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:14:47,224 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:14:47,225 INFO L270 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|)) [2020-10-23 18:14:47,225 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:14:47,225 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:14:47,225 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:14:47,225 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:14:47,226 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:14:47,226 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2020-10-23 18:14:47,226 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 37 44) no Hoare annotation was computed. [2020-10-23 18:14:47,226 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 37 44) no Hoare annotation was computed. [2020-10-23 18:14:47,226 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-10-23 18:14:47,227 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:14:47,227 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-10-23 18:14:47,227 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 6 main_~x~0) (<= main_~x~0 6)) [2020-10-23 18:14:47,227 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-23 18:14:47,227 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:14:47,227 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-10-23 18:14:47,228 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-10-23 18:14:47,228 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-23 18:14:47,228 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse0 (<= |fibo2_#in~n| 4))) (and (or .cse0 (and (<= |fibo2_#t~ret9| 3) (<= 3 |fibo2_#t~ret9|)) (<= 6 |fibo2_#in~n|)) (let ((.cse1 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse1 (<= 5 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret9| 1) .cse1 (< 1 fibo2_~n) (<= 1 |fibo2_#t~ret9|)))) (or (not .cse0) (<= fibo2_~n 3)))) [2020-10-23 18:14:47,228 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-10-23 18:14:47,228 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-10-23 18:14:47,228 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-10-23 18:14:47,229 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-10-23 18:14:47,229 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-10-23 18:14:47,229 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-10-23 18:14:47,229 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-10-23 18:14:47,229 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-23 18:14:47,229 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse1 (<= |fibo1_#in~n| 2)) (.cse5 (<= 1 |fibo1_#t~ret7|)) (.cse6 (<= |fibo1_#t~ret7| 1)) (.cse4 (<= 3 |fibo1_#in~n|))) (let ((.cse0 (and (<= |fibo1_#in~n| 3) .cse5 .cse6 .cse4)) (.cse3 (and .cse5 .cse1 .cse6 (<= 2 |fibo1_#in~n|)))) (and (or .cse0 .cse1 (<= 4 |fibo1_#in~n|)) (let ((.cse2 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 5) .cse2) (and (<= 5 |fibo1_#t~ret7|) .cse2 (<= |fibo1_#t~ret7| 5)) (and (<= 7 |fibo1_#in~n|) .cse2))) (or .cse0 (<= 5 |fibo1_#in~n|) .cse3 (and (<= |fibo1_#t~ret7| 2) (<= 2 |fibo1_#t~ret7|))) (or .cse3 .cse4)))) [2020-10-23 18:14:47,229 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-10-23 18:14:47,229 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-10-23 18:14:47,230 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:14:47,230 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-10-23 18:14:47,230 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:14:47,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:14:47 BoogieIcfgContainer [2020-10-23 18:14:47,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:14:47,238 INFO L168 Benchmark]: Toolchain (without parser) took 32147.26 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 127.9 MB in the beginning and 138.7 MB in the end (delta: -10.8 MB). Peak memory consumption was 224.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:47,238 INFO L168 Benchmark]: CDTParser took 1.36 ms. Allocated memory is still 125.8 MB. Free memory was 96.7 MB in the beginning and 96.6 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:14:47,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.81 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 118.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:47,240 INFO L168 Benchmark]: Boogie Preprocessor took 44.49 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:47,240 INFO L168 Benchmark]: RCFGBuilder took 459.31 ms. Allocated memory is still 153.1 MB. Free memory was 116.6 MB in the beginning and 102.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:47,242 INFO L168 Benchmark]: TraceAbstraction took 31333.29 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 102.1 MB in the beginning and 138.7 MB in the end (delta: -36.5 MB). Peak memory consumption was 199.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:47,246 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36 ms. Allocated memory is still 125.8 MB. Free memory was 96.7 MB in the beginning and 96.6 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.81 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 118.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.49 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 459.31 ms. Allocated memory is still 153.1 MB. Free memory was 116.6 MB in the beginning and 102.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31333.29 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 102.1 MB in the beginning and 138.7 MB in the end (delta: -36.5 MB). Peak memory consumption was 199.3 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 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.1s, OverallIterations: 12, TraceHistogramMax: 15, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 379 SDtfs, 806 SDslu, 1291 SDs, 0 SdLazy, 6003 SolverSat, 853 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1704 GetRequests, 1353 SyntacticMatches, 15 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 95 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 420 PreInvPairs, 570 NumberOfFragments, 204 HoareAnnotationTreeSize, 420 FomulaSimplifications, 11274 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 13 FomulaSimplificationsInter, 6649 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 2139 NumberOfCodeBlocks, 2109 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 2117 ConstructedInterpolants, 0 QuantifiedInterpolants, 673967 SizeOfPredicates, 45 NumberOfNonLiveVariables, 2849 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 5634/7670 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...