/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/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:02,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:02,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:02,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:02,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:02,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:02,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:02,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:02,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:02,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:02,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:02,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:02,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:02,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:02,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:02,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:02,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:02,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:02,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:02,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:02,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:03,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:03,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:03,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:03,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:03,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:03,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:03,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:03,029 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 18:45:03,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:03,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:03,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:03,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:03,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:03,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:03,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:03,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:03,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:03,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:03,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:03,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:03,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:03,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:03,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:03,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:03,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:03,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:03,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:03,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:03,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:03,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:03,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:03,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:03,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:03,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:03,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:03,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:03,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:03,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:03,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:03,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:03,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:03,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:03,496 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:03,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-10-23 18:45:03,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b428cba2/39c295d17ea146bba93d5880b9fac95c/FLAG53b601ac4 [2020-10-23 18:45:04,252 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:04,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-10-23 18:45:04,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b428cba2/39c295d17ea146bba93d5880b9fac95c/FLAG53b601ac4 [2020-10-23 18:45:04,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b428cba2/39c295d17ea146bba93d5880b9fac95c [2020-10-23 18:45:04,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:04,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:04,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:04,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:04,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:04,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da04b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04, skipping insertion in model container [2020-10-23 18:45:04,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:04,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:04,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:04,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:04,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:04,888 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:04,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04 WrapperNode [2020-10-23 18:45:04,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:04,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:04,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:04,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:04,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (1/1) ... [2020-10-23 18:45:04,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:04,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:04,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:04,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:04,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (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 18:45:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:05,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:05,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:05,411 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:05,412 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-23 18:45:05,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:05 BoogieIcfgContainer [2020-10-23 18:45:05,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:05,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:05,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:05,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:05,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:04" (1/3) ... [2020-10-23 18:45:05,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4150601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:05, skipping insertion in model container [2020-10-23 18:45:05,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:04" (2/3) ... [2020-10-23 18:45:05,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4150601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:05, skipping insertion in model container [2020-10-23 18:45:05,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:05" (3/3) ... [2020-10-23 18:45:05,441 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-10-23 18:45:05,473 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:05,486 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:05,522 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:05,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:05,568 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:05,568 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:05,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:05,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:05,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:05,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:05,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-23 18:45:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:45:05,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:05,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:05,606 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash -124765521, now seen corresponding path program 1 times [2020-10-23 18:45:05,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:05,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398988721] [2020-10-23 18:45:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,068 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 18:45:06,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398988721] [2020-10-23 18:45:06,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:06,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:45:06,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921707505] [2020-10-23 18:45:06,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:45:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:06,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:45:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:45:06,094 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-23 18:45:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:06,162 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-10-23 18:45:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:45:06,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-23 18:45:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:06,172 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:45:06,173 INFO L226 Difference]: Without dead ends: 24 [2020-10-23 18:45:06,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:45:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-23 18:45:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-23 18:45:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 18:45:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-23 18:45:06,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-23 18:45:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:06,227 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-23 18:45:06,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:45:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-23 18:45:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:45:06,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:06,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:06,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:06,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash -296540427, now seen corresponding path program 1 times [2020-10-23 18:45:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:06,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758720169] [2020-10-23 18:45:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,337 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 18:45:06,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758720169] [2020-10-23 18:45:06,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:06,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:45:06,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124806681] [2020-10-23 18:45:06,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:45:06,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:45:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:45:06,341 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-23 18:45:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:06,494 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-23 18:45:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:45:06,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-23 18:45:06,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:06,496 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:45:06,497 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 18:45:06,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:45:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 18:45:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-23 18:45:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:45:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-23 18:45:06,512 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-10-23 18:45:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:06,513 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-23 18:45:06,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:45:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-23 18:45:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:45:06,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:06,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:06,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:45:06,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 934243063, now seen corresponding path program 1 times [2020-10-23 18:45:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:06,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960501685] [2020-10-23 18:45:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960501685] [2020-10-23 18:45:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118548653] [2020-10-23 18:45:06,646 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 18:45:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:45:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:06,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:06,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-23 18:45:06,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393355345] [2020-10-23 18:45:06,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:45:06,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:45:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:45:06,779 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-23 18:45:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:06,998 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-23 18:45:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:45:06,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:45:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:07,001 INFO L225 Difference]: With dead ends: 54 [2020-10-23 18:45:07,001 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:45:07,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:45:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:45:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-23 18:45:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:45:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-23 18:45:07,011 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-23 18:45:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:07,012 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-23 18:45:07,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:45:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-23 18:45:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:45:07,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:07,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:07,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:45:07,222 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:07,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1693796743, now seen corresponding path program 2 times [2020-10-23 18:45:07,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:07,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358438674] [2020-10-23 18:45:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:07,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358438674] [2020-10-23 18:45:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668388452] [2020-10-23 18:45:07,400 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 [2020-10-23 18:45:07,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:45:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:45:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:07,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:07,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:45:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95939559] [2020-10-23 18:45:07,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:45:07,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:45:07,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:45:07,529 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-23 18:45:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:07,781 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-23 18:45:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:45:07,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-23 18:45:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:07,783 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:45:07,783 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:45:07,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:45:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:45:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-10-23 18:45:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:45:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-23 18:45:07,794 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-23 18:45:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:07,794 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-23 18:45:07,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:45:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-23 18:45:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:45:07,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:07,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:08,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:08,010 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1799280261, now seen corresponding path program 3 times [2020-10-23 18:45:08,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:08,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62511460] [2020-10-23 18:45:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:08,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:08,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62511460] [2020-10-23 18:45:08,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844327106] [2020-10-23 18:45:08,138 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 [2020-10-23 18:45:08,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:45:08,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:45:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:14,817 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-23 18:45:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:45:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-10-23 18:45:14,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56669782] [2020-10-23 18:45:14,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:45:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:14,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:45:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2020-10-23 18:45:14,948 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-23 18:45:15,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:15,162 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-23 18:45:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:45:15,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-23 18:45:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:15,164 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:45:15,164 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:45:15,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2020-10-23 18:45:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:45:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:45:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:45:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:45:15,166 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-23 18:45:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:15,166 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:45:15,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:45:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:45:15,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:45:15,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:15,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:45:15,960 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:45:15,960 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:45:15,960 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:45:15,961 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:45:15,961 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:45:15,961 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 18:45:15,961 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:45:15,962 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:45:15,967 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:45:15,967 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:45:15,967 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:45:15,968 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2020-10-23 18:45:15,968 INFO L274 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-10-23 18:45:15,968 INFO L270 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (or (= main_~v~0 0) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2020-10-23 18:45:15,968 INFO L270 CegarLoopResult]: At program point L23-4(line 23) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 (mod main_~v~0 4294967296))) [2020-10-23 18:45:15,968 INFO L274 CegarLoopResult]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2020-10-23 18:45:15,969 INFO L270 CegarLoopResult]: At program point L19-3(lines 19 25) the Hoare annotation is: (or (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (< (mod main_~v~0 4294967296) 10)) [2020-10-23 18:45:15,969 INFO L274 CegarLoopResult]: For program point L19-4(lines 19 25) no Hoare annotation was computed. [2020-10-23 18:45:15,969 INFO L274 CegarLoopResult]: For program point L24(lines 22 25) no Hoare annotation was computed. [2020-10-23 18:45:15,969 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 25) no Hoare annotation was computed. [2020-10-23 18:45:15,969 INFO L270 CegarLoopResult]: At program point L20-3(lines 20 25) the Hoare annotation is: (or (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (< (mod main_~v~0 4294967296) 10)) [2020-10-23 18:45:15,969 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 25) no Hoare annotation was computed. [2020-10-23 18:45:15,969 INFO L270 CegarLoopResult]: At program point L21-3(lines 21 25) the Hoare annotation is: (or (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (< (mod main_~v~0 4294967296) 10)) [2020-10-23 18:45:15,970 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2020-10-23 18:45:15,970 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2020-10-23 18:45:15,970 INFO L270 CegarLoopResult]: At program point L22-2(lines 22 25) the Hoare annotation is: (or (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (< (mod main_~v~0 4294967296) 10)) [2020-10-23 18:45:15,970 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-23 18:45:15,970 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-23 18:45:15,971 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (or (not (<= 0 |__VERIFIER_assert_#in~cond|)) (not (< |__VERIFIER_assert_#in~cond| 4)) (forall ((aux_div_aux_div_aux_mod_v_main_~v~0_BEFORE_CALL_1_42_44_114 Int) (aux_div_aux_mod_aux_div_aux_mod_v_main_~v~0_BEFORE_CALL_1_42_44_114_108 Int)) (let ((.cse2 (* 4 aux_div_aux_mod_aux_div_aux_mod_v_main_~v~0_BEFORE_CALL_1_42_44_114_108))) (let ((.cse1 (+ (* 4294967296 aux_div_aux_div_aux_mod_v_main_~v~0_BEFORE_CALL_1_42_44_114) .cse2)) (.cse0 (* 3 |__VERIFIER_assert_#in~cond|))) (or (not (<= (+ .cse0 4294967296) .cse1)) (not (< .cse2 (+ .cse0 4294967297))) (not (<= (+ .cse0 1) .cse2)) (not (< .cse1 (+ .cse0 8589934592))) (not (<= (+ .cse0 4294967306) .cse1)) (not (< .cse2 (+ .cse0 11)))))))) [2020-10-23 18:45:15,971 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:45:15,971 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-23 18:45:15,971 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-23 18:45:15,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:45:15 BoogieIcfgContainer [2020-10-23 18:45:15,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:45:15,993 INFO L168 Benchmark]: Toolchain (without parser) took 11379.98 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 127.9 MB in the beginning and 146.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:45:15,994 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:45:15,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.58 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 117.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:45:15,995 INFO L168 Benchmark]: Boogie Preprocessor took 41.34 ms. Allocated memory is still 152.0 MB. Free memory was 117.4 MB in the beginning and 115.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:45:15,996 INFO L168 Benchmark]: RCFGBuilder took 485.61 ms. Allocated memory is still 152.0 MB. Free memory was 115.7 MB in the beginning and 135.4 MB in the end (delta: -19.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:45:15,997 INFO L168 Benchmark]: TraceAbstraction took 10571.01 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 134.6 MB in the beginning and 146.0 MB in the end (delta: -11.5 MB). Peak memory consumption was 100.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:45:16,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.58 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 117.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.34 ms. Allocated memory is still 152.0 MB. Free memory was 117.4 MB in the beginning and 115.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 485.61 ms. Allocated memory is still 152.0 MB. Free memory was 115.7 MB in the beginning and 135.4 MB in the end (delta: -19.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10571.01 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 134.6 MB in the beginning and 146.0 MB in the end (delta: -11.5 MB). Peak memory consumption was 100.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (v + 4294967295) % 4294967296 < 10 || v % 4294967296 < 10 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (v + 4294967295) % 4294967296 < 10 || v % 4294967296 < 10 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: v == 0 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (v + 4294967295) % 4294967296 < 10 || v % 4294967296 < 10 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (v + 4294967295) % 4294967296 < 10 || v % 4294967296 < 10 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 198 SDslu, 133 SDs, 0 SdLazy, 205 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 25 PreInvPairs, 38 NumberOfFragments, 195 HoareAnnotationTreeSize, 25 FomulaSimplifications, 3547 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 13 FomulaSimplificationsInter, 582 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 152 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 144 ConstructedInterpolants, 2 QuantifiedInterpolants, 10892 SizeOfPredicates, 4 NumberOfNonLiveVariables, 339 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 9/28 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...