/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/bitvector/num_conversion_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:13:25,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:13:25,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:13:25,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 23:13:25,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 23:13:25,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 23:13:25,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 23:13:25,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 23:13:26,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 23:13:26,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 23:13:26,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 23:13:26,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 23:13:26,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:13:26,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:13:26,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:13:26,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:13:26,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:13:26,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:13:26,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:13:26,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:13:26,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:13:26,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:13:26,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:13:26,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:13:26,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 23:13:26,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 23:13:26,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 23:13:26,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 23:13:26,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 23:13:26,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 23:13:26,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 23:13:26,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 23:13:26,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 23:13:26,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 23:13:26,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 23:13:26,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 23:13:26,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 23:13:26,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 23:13:26,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:13:26,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:13:26,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:13:26,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:13:26,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:13:26,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:13:26,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:13:26,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:13:26,123 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:13:26,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:13:26,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:13:26,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:13:26,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:13:26,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:13:26,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:13:26,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:13:26,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:13:26,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:13:26,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:13:26,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:13:26,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:13:26,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:13:26,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:13:26,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:13:26,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:13:26,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:13:26,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:13:26,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:13:26,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:13:26,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:13:26,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:13:26,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:13:26,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:13:26,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:13:26,570 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:13:26,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2020-12-21 23:13:26,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fc42672f/4fcf83bbd9df42b8961a466d641eb2a2/FLAGc229301f6 [2020-12-21 23:13:27,282 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:13:27,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2020-12-21 23:13:27,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fc42672f/4fcf83bbd9df42b8961a466d641eb2a2/FLAGc229301f6 [2020-12-21 23:13:27,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fc42672f/4fcf83bbd9df42b8961a466d641eb2a2 [2020-12-21 23:13:27,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:13:27,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:13:27,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:13:27,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:13:27,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:13:27,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:13:27" (1/1) ... [2020-12-21 23:13:27,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9580f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:27, skipping insertion in model container [2020-12-21 23:13:27,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:13:27" (1/1) ... [2020-12-21 23:13:27,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:13:27,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:13:27,951 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2020-12-21 23:13:27,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:13:27,986 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:13:28,000 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2020-12-21 23:13:28,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:13:28,025 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:13:28,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28 WrapperNode [2020-12-21 23:13:28,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:13:28,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:13:28,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:13:28,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:13:28,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:13:28,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:13:28,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:13:28,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:13:28,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (1/1) ... [2020-12-21 23:13:28,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:13:28,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:13:28,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:13:28,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:13:28,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (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 [2020-12-21 23:13:28,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:13:28,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:13:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:13:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:13:28,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:13:28,403 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-21 23:13:28,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:13:28 BoogieIcfgContainer [2020-12-21 23:13:28,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:13:28,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:13:28,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:13:28,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:13:28,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:13:27" (1/3) ... [2020-12-21 23:13:28,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe33cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:13:28, skipping insertion in model container [2020-12-21 23:13:28,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:28" (2/3) ... [2020-12-21 23:13:28,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe33cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:13:28, skipping insertion in model container [2020-12-21 23:13:28,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:13:28" (3/3) ... [2020-12-21 23:13:28,414 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2020-12-21 23:13:28,421 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:13:28,430 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:13:28,485 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:13:28,547 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:13:28,548 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:13:28,549 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:13:28,549 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:13:28,549 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:13:28,550 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:13:28,550 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:13:28,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:13:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-21 23:13:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-21 23:13:28,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:28,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-21 23:13:28,591 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2020-12-21 23:13:28,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:28,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3654245] [2020-12-21 23:13:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:28,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3654245] [2020-12-21 23:13:28,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:13:28,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:13:28,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303527621] [2020-12-21 23:13:28,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 23:13:28,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 23:13:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 23:13:28,785 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-21 23:13:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:28,802 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-21 23:13:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 23:13:28,804 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-21 23:13:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:28,813 INFO L225 Difference]: With dead ends: 21 [2020-12-21 23:13:28,813 INFO L226 Difference]: Without dead ends: 9 [2020-12-21 23:13:28,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 23:13:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-21 23:13:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-21 23:13:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-21 23:13:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-21 23:13:28,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-21 23:13:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:28,853 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-21 23:13:28,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 23:13:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-21 23:13:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-21 23:13:28,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:28,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-21 23:13:28,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:13:28,854 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2020-12-21 23:13:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172421251] [2020-12-21 23:13:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:28,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172421251] [2020-12-21 23:13:28,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:13:28,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:13:28,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780563816] [2020-12-21 23:13:28,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:13:28,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:28,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:13:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:13:28,930 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2020-12-21 23:13:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:28,944 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-21 23:13:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:13:28,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-21 23:13:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:28,945 INFO L225 Difference]: With dead ends: 16 [2020-12-21 23:13:28,946 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 23:13:28,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:13:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 23:13:28,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-21 23:13:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-21 23:13:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-21 23:13:28,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-21 23:13:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:28,951 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-21 23:13:28,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:13:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-21 23:13:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 23:13:28,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:28,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:28,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:13:28,952 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2020-12-21 23:13:28,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:28,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587703481] [2020-12-21 23:13:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587703481] [2020-12-21 23:13:29,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542142661] [2020-12-21 23:13:29,034 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 [2020-12-21 23:13:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:13:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:29,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 23:13:29,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732718459] [2020-12-21 23:13:29,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:13:29,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:13:29,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:13:29,137 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-21 23:13:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:29,159 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-21 23:13:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:13:29,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-21 23:13:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:29,161 INFO L225 Difference]: With dead ends: 19 [2020-12-21 23:13:29,161 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 23:13:29,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:13:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 23:13:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2020-12-21 23:13:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 23:13:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-21 23:13:29,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-12-21 23:13:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:29,166 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-21 23:13:29,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:13:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-21 23:13:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 23:13:29,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:29,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:29,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 23:13:29,381 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2020-12-21 23:13:29,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:29,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062703729] [2020-12-21 23:13:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062703729] [2020-12-21 23:13:29,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406104231] [2020-12-21 23:13:29,514 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:29,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:13:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 23:13:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:29,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 23:13:29,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129988093] [2020-12-21 23:13:29,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:13:29,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:29,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:13:29,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:13:29,617 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 7 states. [2020-12-21 23:13:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:29,651 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-21 23:13:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:13:29,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 23:13:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:29,653 INFO L225 Difference]: With dead ends: 22 [2020-12-21 23:13:29,653 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 23:13:29,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:13:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 23:13:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-21 23:13:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 23:13:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 23:13:29,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2020-12-21 23:13:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:29,659 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 23:13:29,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:13:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 23:13:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 23:13:29,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:29,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:29,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:29,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:29,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:29,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2020-12-21 23:13:29,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:29,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11238945] [2020-12-21 23:13:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11238945] [2020-12-21 23:13:29,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140110066] [2020-12-21 23:13:29,986 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:30,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 23:13:30,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:30,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 23:13:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:30,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:30,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-21 23:13:30,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576100398] [2020-12-21 23:13:30,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:13:30,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:30,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:13:30,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:13:30,137 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 9 states. [2020-12-21 23:13:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:30,184 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-21 23:13:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:13:30,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-21 23:13:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:30,185 INFO L225 Difference]: With dead ends: 25 [2020-12-21 23:13:30,185 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 23:13:30,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:13:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 23:13:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-21 23:13:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 23:13:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 23:13:30,191 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2020-12-21 23:13:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:30,191 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 23:13:30,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:13:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 23:13:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 23:13:30,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:30,192 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:30,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:30,408 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 4 times [2020-12-21 23:13:30,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:30,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069362918] [2020-12-21 23:13:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:30,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069362918] [2020-12-21 23:13:30,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857929924] [2020-12-21 23:13:30,566 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:30,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:13:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:30,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 23:13:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:30,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:30,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-21 23:13:30,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157562353] [2020-12-21 23:13:30,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 23:13:30,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:30,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 23:13:30,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:13:30,713 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 11 states. [2020-12-21 23:13:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:30,779 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-21 23:13:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 23:13:30,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-21 23:13:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:30,780 INFO L225 Difference]: With dead ends: 28 [2020-12-21 23:13:30,780 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 23:13:30,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:13:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 23:13:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-21 23:13:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 23:13:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-21 23:13:30,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2020-12-21 23:13:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:30,786 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-21 23:13:30,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 23:13:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-21 23:13:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 23:13:30,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:30,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:31,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:31,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash -133759111, now seen corresponding path program 5 times [2020-12-21 23:13:31,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:31,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167764263] [2020-12-21 23:13:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167764263] [2020-12-21 23:13:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294245992] [2020-12-21 23:13:31,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:31,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 23:13:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 23:13:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:31,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:31,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-21 23:13:31,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393655276] [2020-12-21 23:13:31,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 23:13:31,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:31,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 23:13:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:13:31,344 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 13 states. [2020-12-21 23:13:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:31,422 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-12-21 23:13:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:13:31,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-21 23:13:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:31,424 INFO L225 Difference]: With dead ends: 31 [2020-12-21 23:13:31,424 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 23:13:31,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:13:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 23:13:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-21 23:13:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 23:13:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-12-21 23:13:31,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2020-12-21 23:13:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:31,429 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-12-21 23:13:31,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 23:13:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-12-21 23:13:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:13:31,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:31,430 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:31,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 23:13:31,634 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:31,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 6 times [2020-12-21 23:13:31,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:31,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844544143] [2020-12-21 23:13:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:31,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844544143] [2020-12-21 23:13:31,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860822442] [2020-12-21 23:13:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:31,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 23:13:31,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:31,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 23:13:31,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:31,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:31,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-21 23:13:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924002038] [2020-12-21 23:13:31,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 23:13:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:31,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 23:13:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:13:31,963 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 15 states. [2020-12-21 23:13:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:32,096 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-21 23:13:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:13:32,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-21 23:13:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:32,097 INFO L225 Difference]: With dead ends: 34 [2020-12-21 23:13:32,097 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 23:13:32,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:13:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 23:13:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-21 23:13:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 23:13:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-21 23:13:32,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 24 [2020-12-21 23:13:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:32,103 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-21 23:13:32,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 23:13:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-21 23:13:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 23:13:32,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:32,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:32,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:32,317 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash 387561689, now seen corresponding path program 7 times [2020-12-21 23:13:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102901523] [2020-12-21 23:13:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102901523] [2020-12-21 23:13:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316928025] [2020-12-21 23:13:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 23:13:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:32,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:32,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-21 23:13:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086651113] [2020-12-21 23:13:32,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 23:13:32,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 23:13:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:13:32,708 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2020-12-21 23:13:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:32,847 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-21 23:13:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 23:13:32,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-12-21 23:13:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:32,848 INFO L225 Difference]: With dead ends: 37 [2020-12-21 23:13:32,848 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 23:13:32,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:13:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 23:13:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-12-21 23:13:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 23:13:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-12-21 23:13:32,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 27 [2020-12-21 23:13:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:32,854 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-12-21 23:13:32,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 23:13:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-12-21 23:13:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 23:13:32,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:32,855 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:33,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:33,059 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 8 times [2020-12-21 23:13:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:33,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924208770] [2020-12-21 23:13:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:13:33,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:13:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:13:33,092 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:13:33,113 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 23:13:33,114 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 23:13:33,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 23:13:33,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:13:33 BoogieIcfgContainer [2020-12-21 23:13:33,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 23:13:33,162 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 23:13:33,162 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 23:13:33,162 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 23:13:33,163 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:13:28" (3/4) ... [2020-12-21 23:13:33,166 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-21 23:13:33,166 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 23:13:33,168 INFO L168 Benchmark]: Toolchain (without parser) took 5475.96 ms. Allocated memory was 152.0 MB in the beginning and 191.9 MB in the end (delta: 39.8 MB). Free memory was 126.6 MB in the beginning and 154.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:33,169 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory was 123.6 MB in the beginning and 123.6 MB in the end (delta: 79.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:13:33,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.68 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:33,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.42 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:33,171 INFO L168 Benchmark]: Boogie Preprocessor took 42.85 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 114.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:33,171 INFO L168 Benchmark]: RCFGBuilder took 289.30 ms. Allocated memory is still 152.0 MB. Free memory was 114.3 MB in the beginning and 103.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:33,172 INFO L168 Benchmark]: TraceAbstraction took 4754.33 ms. Allocated memory was 152.0 MB in the beginning and 191.9 MB in the end (delta: 39.8 MB). Free memory was 102.6 MB in the beginning and 155.0 MB in the end (delta: -52.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:13:33,173 INFO L168 Benchmark]: Witness Printer took 4.19 ms. Allocated memory is still 191.9 MB. Free memory was 155.0 MB in the beginning and 154.5 MB in the end (delta: 524.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:13:33,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory was 123.6 MB in the beginning and 123.6 MB in the end (delta: 79.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 332.68 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.42 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.85 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 114.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.30 ms. Allocated memory is still 152.0 MB. Free memory was 114.3 MB in the beginning and 103.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4754.33 ms. Allocated memory was 152.0 MB in the beginning and 191.9 MB in the end (delta: 39.8 MB). Free memory was 102.6 MB in the beginning and 155.0 MB in the end (delta: -52.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 4.19 ms. Allocated memory is still 191.9 MB. Free memory was 155.0 MB in the beginning and 154.5 MB in the end (delta: 524.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 23, overapproximation of bitwiseAnd at line 24. Possible FailurePath: [L16] unsigned char x = __VERIFIER_nondet_uchar(); [L17] unsigned char y; [L18] unsigned char c; [L20] y = 0 [L21] c = 0 [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND FALSE !(c < (unsigned char)8) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 134 SDslu, 640 SDs, 0 SdLazy, 609 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 248 ConstructedInterpolants, 0 QuantifiedInterpolants, 25750 SizeOfPredicates, 7 NumberOfNonLiveVariables, 455 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/392 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...