/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/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:28:57,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:28:57,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:28:57,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:28:57,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:28:57,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:28:57,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:28:57,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:28:57,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:28:57,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:28:57,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:28:57,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:28:57,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:28:57,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:28:57,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:28:57,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:28:57,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:28:57,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:28:57,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:28:57,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:28:57,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:28:57,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:28:57,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:28:57,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:28:57,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:28:57,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:28:57,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:28:57,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:28:57,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:28:57,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:28:57,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:28:57,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:28:57,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:28:57,872 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:28:57,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:28:57,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:28:57,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:28:57,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:28:57,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:28:57,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:28:57,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:28:57,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:28:57,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:28:57,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:28:57,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:28:57,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:28:57,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:28:57,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:28:57,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:28:57,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:28:57,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:28:57,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:28:57,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:28:57,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:28:57,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:28:58,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:28:58,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:28:58,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:28:58,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:28:58,394 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:28:58,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2020-12-21 21:28:58,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d970ac3b4/5254f79d355a43c6b78c7e132104bdc1/FLAGa9582fd6d [2020-12-21 21:28:59,216 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:28:59,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2020-12-21 21:28:59,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d970ac3b4/5254f79d355a43c6b78c7e132104bdc1/FLAGa9582fd6d [2020-12-21 21:28:59,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d970ac3b4/5254f79d355a43c6b78c7e132104bdc1 [2020-12-21 21:28:59,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:28:59,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:28:59,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:59,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:28:59,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:28:59,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3a30c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59, skipping insertion in model container [2020-12-21 21:28:59,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:28:59,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:28:59,879 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/array-examples/standard_copy9_ground-2.i[816,829] [2020-12-21 21:28:59,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:59,961 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:28:59,990 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/array-examples/standard_copy9_ground-2.i[816,829] [2020-12-21 21:29:00,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:00,064 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:29:00,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00 WrapperNode [2020-12-21 21:29:00,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:00,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:00,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:29:00,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:29:00,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:00,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:29:00,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:29:00,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:29:00,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:29:00,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:29:00,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:29:00,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:29:00,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (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 21:29:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:29:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:29:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:29:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:29:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:29:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:29:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:29:00,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:29:00,937 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:29:00,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:00 BoogieIcfgContainer [2020-12-21 21:29:00,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:29:00,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:29:00,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:29:00,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:29:00,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:28:59" (1/3) ... [2020-12-21 21:29:00,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d4b68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (2/3) ... [2020-12-21 21:29:00,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d4b68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:00" (3/3) ... [2020-12-21 21:29:00,948 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2020-12-21 21:29:00,956 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:29:00,962 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:29:00,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:29:01,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:29:01,016 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:29:01,016 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:29:01,016 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:29:01,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:29:01,016 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:29:01,016 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:29:01,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:29:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-21 21:29:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:29:01,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:01,043 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1887916137, now seen corresponding path program 1 times [2020-12-21 21:29:01,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:01,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469458595] [2020-12-21 21:29:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,304 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 21:29:01,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469458595] [2020-12-21 21:29:01,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:29:01,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:29:01,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555422792] [2020-12-21 21:29:01,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:01,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:29:01,334 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-12-21 21:29:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:01,373 INFO L93 Difference]: Finished difference Result 82 states and 126 transitions. [2020-12-21 21:29:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:01,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 21:29:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:01,387 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:29:01,387 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:29:01,391 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 21:29:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:29:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-21 21:29:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:29:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-21 21:29:01,441 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 25 [2020-12-21 21:29:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:01,441 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-21 21:29:01,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-21 21:29:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:29:01,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:01,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:29:01,444 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:01,445 INFO L82 PathProgramCache]: Analyzing trace with hash -166940861, now seen corresponding path program 1 times [2020-12-21 21:29:01,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:01,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774424175] [2020-12-21 21:29:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,547 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 21:29:01,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774424175] [2020-12-21 21:29:01,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959470892] [2020-12-21 21:29:01,548 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 21:29:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:29:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:29:01,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:29:01,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:29:01,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57857241] [2020-12-21 21:29:01,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:01,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:01,707 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-21 21:29:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:01,827 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2020-12-21 21:29:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:01,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 21:29:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:01,829 INFO L225 Difference]: With dead ends: 88 [2020-12-21 21:29:01,829 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:29:01,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:29:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-12-21 21:29:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:29:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-21 21:29:01,841 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2020-12-21 21:29:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:01,841 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-21 21:29:01,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-21 21:29:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:29:01,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:02,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:29:02,060 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:02,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1109508687, now seen corresponding path program 1 times [2020-12-21 21:29:02,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:02,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755121230] [2020-12-21 21:29:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:29:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755121230] [2020-12-21 21:29:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25443792] [2020-12-21 21:29:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:29:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:02,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650588921] [2020-12-21 21:29:02,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:02,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:02,402 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-12-21 21:29:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:02,453 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-12-21 21:29:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:02,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-21 21:29:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:02,455 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:29:02,456 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:29:02,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:29:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-21 21:29:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:29:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-21 21:29:02,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 45 [2020-12-21 21:29:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:02,479 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-21 21:29:02,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-21 21:29:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:29:02,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:02,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:02,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,701 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:02,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1487152111, now seen corresponding path program 2 times [2020-12-21 21:29:02,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:02,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144989876] [2020-12-21 21:29:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:29:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144989876] [2020-12-21 21:29:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367537721] [2020-12-21 21:29:02,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:29:02,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:02,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864198941] [2020-12-21 21:29:02,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:02,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:02,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:02,942 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-12-21 21:29:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:03,109 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2020-12-21 21:29:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:03,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-12-21 21:29:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:03,111 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:29:03,111 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:29:03,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:29:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-12-21 21:29:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:29:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-12-21 21:29:03,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2020-12-21 21:29:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:03,121 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-12-21 21:29:03,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-12-21 21:29:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:29:03,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:03,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:03,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,338 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1870323549, now seen corresponding path program 3 times [2020-12-21 21:29:03,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:03,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934747031] [2020-12-21 21:29:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:29:03,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934747031] [2020-12-21 21:29:03,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896736782] [2020-12-21 21:29:03,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:29:03,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:29:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:29:03,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:03,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 21:29:03,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972847857] [2020-12-21 21:29:03,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:29:03,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:29:03,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:03,793 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 8 states. [2020-12-21 21:29:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:04,052 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-12-21 21:29:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:29:04,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-12-21 21:29:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:04,054 INFO L225 Difference]: With dead ends: 159 [2020-12-21 21:29:04,054 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:29:04,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:29:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-12-21 21:29:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 21:29:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-12-21 21:29:04,065 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 65 [2020-12-21 21:29:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:04,065 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-12-21 21:29:04,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:29:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-12-21 21:29:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:29:04,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:04,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:04,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:04,281 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1430561545, now seen corresponding path program 4 times [2020-12-21 21:29:04,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:04,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508486028] [2020-12-21 21:29:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:29:04,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508486028] [2020-12-21 21:29:04,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529891395] [2020-12-21 21:29:04,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:04,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:29:04,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:29:04,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:04,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:29:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143168452] [2020-12-21 21:29:04,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:29:04,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:29:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:04,574 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 7 states. [2020-12-21 21:29:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:04,600 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-12-21 21:29:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:29:04,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-12-21 21:29:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:04,602 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:29:04,602 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:29:04,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:29:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-21 21:29:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:29:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-12-21 21:29:04,612 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 85 [2020-12-21 21:29:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:04,613 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-12-21 21:29:04,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:29:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-12-21 21:29:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:29:04,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:04,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:04,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:29:04,829 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash -59313337, now seen corresponding path program 5 times [2020-12-21 21:29:04,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:04,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690207263] [2020-12-21 21:29:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:29:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690207263] [2020-12-21 21:29:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176577941] [2020-12-21 21:29:04,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true