/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/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:38,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:38,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:38,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:38,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:38,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:38,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:38,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:38,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:38,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:38,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:38,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:38,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:38,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:38,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:38,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:38,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:38,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:38,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:38,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:38,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:38,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:38,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:38,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:38,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:38,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:38,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:38,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:38,634 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:38,661 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:38,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:38,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:38,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:38,664 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:38,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:38,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:38,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:38,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:38,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:38,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:38,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:38,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:38,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:38,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:38,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:38,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:38,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:38,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:38,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:38,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:38,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:38,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:38,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:38,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:38,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:38,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:38,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:38,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:38,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:39,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:39,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:39,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:39,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:39,100 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:39,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-11-06 22:45:39,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ff6d998/25d1c8cf8cba4ffe85018af5bdb5aa9b/FLAGca41d7c45 [2020-11-06 22:45:39,784 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:39,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-11-06 22:45:39,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ff6d998/25d1c8cf8cba4ffe85018af5bdb5aa9b/FLAGca41d7c45 [2020-11-06 22:45:40,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ff6d998/25d1c8cf8cba4ffe85018af5bdb5aa9b [2020-11-06 22:45:40,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:40,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:40,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:40,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:40,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:40,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63086b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40, skipping insertion in model container [2020-11-06 22:45:40,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:40,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:40,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:40,381 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:40,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:40,415 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:40,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40 WrapperNode [2020-11-06 22:45:40,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:40,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:40,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:40,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:40,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... [2020-11-06 22:45:40,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:40,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:40,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:40,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:40,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:40,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:40,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:40,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:40,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:40,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:40,943 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:40,943 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:40,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:40 BoogieIcfgContainer [2020-11-06 22:45:40,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:40,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:40,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:40,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:40,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:40" (1/3) ... [2020-11-06 22:45:40,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36efa08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:40, skipping insertion in model container [2020-11-06 22:45:40,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:40" (2/3) ... [2020-11-06 22:45:40,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36efa08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:40, skipping insertion in model container [2020-11-06 22:45:40,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:40" (3/3) ... [2020-11-06 22:45:40,959 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-11-06 22:45:40,976 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:40,980 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:40,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:41,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:41,029 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:41,029 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:41,029 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:41,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:41,030 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:41,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:41,030 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-06 22:45:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:41,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:41,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:41,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:41,083 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-11-06 22:45:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:41,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146033638] [2020-11-06 22:45:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:41,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146033638] [2020-11-06 22:45:41,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:41,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:41,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527121814] [2020-11-06 22:45:41,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:41,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:41,479 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-11-06 22:45:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:41,564 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-06 22:45:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:41,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:45:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:41,576 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:45:41,576 INFO L226 Difference]: Without dead ends: 13 [2020-11-06 22:45:41,580 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 [2020-11-06 22:45:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-06 22:45:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-06 22:45:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-06 22:45:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-06 22:45:41,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-11-06 22:45:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:41,627 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-06 22:45:41,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-06 22:45:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:41,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:41,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:41,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:41,629 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:41,629 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-11-06 22:45:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:41,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688168249] [2020-11-06 22:45:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:41,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688168249] [2020-11-06 22:45:41,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:41,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:41,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894510606] [2020-11-06 22:45:41,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:41,816 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-11-06 22:45:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:41,952 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-06 22:45:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:45:41,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-06 22:45:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:41,954 INFO L225 Difference]: With dead ends: 20 [2020-11-06 22:45:41,954 INFO L226 Difference]: Without dead ends: 14 [2020-11-06 22:45:41,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-06 22:45:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-06 22:45:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-06 22:45:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-06 22:45:41,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-11-06 22:45:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:41,964 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-06 22:45:41,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-06 22:45:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:41,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:41,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:41,965 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:41,966 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-11-06 22:45:41,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:41,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524519376] [2020-11-06 22:45:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:42,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524519376] [2020-11-06 22:45:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302716146] [2020-11-06 22:45:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:45:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:42,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:42,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:45:42,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262460119] [2020-11-06 22:45:42,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:42,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:42,307 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-11-06 22:45:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:42,504 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-06 22:45:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:42,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-06 22:45:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:42,506 INFO L225 Difference]: With dead ends: 21 [2020-11-06 22:45:42,506 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:45:42,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:45:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:45:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:45:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:45:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-06 22:45:42,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-06 22:45:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:42,515 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-06 22:45:42,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-06 22:45:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:45:42,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:42,516 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:42,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:42,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-11-06 22:45:42,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:42,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923924085] [2020-11-06 22:45:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:42,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923924085] [2020-11-06 22:45:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614801858] [2020-11-06 22:45:42,948 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 [2020-11-06 22:45:43,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:43,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:43,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:45:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465384448] [2020-11-06 22:45:43,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:45:43,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:45:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:43,162 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-11-06 22:45:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:43,435 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-06 22:45:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:43,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-06 22:45:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:43,437 INFO L225 Difference]: With dead ends: 22 [2020-11-06 22:45:43,437 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:45:43,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:45:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:45:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:45:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-06 22:45:43,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-06 22:45:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:43,445 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-06 22:45:43,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:45:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-06 22:45:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:45:43,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:43,446 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:43,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:43,660 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-11-06 22:45:43,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:43,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211468497] [2020-11-06 22:45:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:43,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:43,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211468497] [2020-11-06 22:45:43,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471322561] [2020-11-06 22:45:43,922 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 [2020-11-06 22:45:44,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 22:45:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:45:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-06 22:45:44,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:45:44,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-11-06 22:45:44,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522953696] [2020-11-06 22:45:44,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:45:44,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:45:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:44,093 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-11-06 22:45:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:44,124 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-06 22:45:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:44,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-06 22:45:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:44,125 INFO L225 Difference]: With dead ends: 16 [2020-11-06 22:45:44,125 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:45:44,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:45:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:45:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:45:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:45:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:45:44,127 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-06 22:45:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:44,128 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:45:44,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:45:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:45:44,128 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:45:44,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:44,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:45:44,498 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:45:44,498 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:45:44,498 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:45:44,498 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:45:44,499 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:44,499 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:45:44,499 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:44,499 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:44,499 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:45:44,500 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:45:44,500 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:44,500 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2020-11-06 22:45:44,500 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 12 22) no Hoare annotation was computed. [2020-11-06 22:45:44,500 INFO L262 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (= main_~y~0 0) (= main_~x~0 0)) [2020-11-06 22:45:44,500 INFO L262 CegarLoopResult]: At program point L16-3(lines 16 19) the Hoare annotation is: (= main_~x~0 0) [2020-11-06 22:45:44,500 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 12 22) no Hoare annotation was computed. [2020-11-06 22:45:44,501 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-11-06 22:45:44,501 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:45:44,501 INFO L262 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-11-06 22:45:44,501 INFO L266 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-06 22:45:44,501 INFO L266 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-11-06 22:45:44,501 INFO L266 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:45:44,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:44 BoogieIcfgContainer [2020-11-06 22:45:44,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:44,522 INFO L168 Benchmark]: Toolchain (without parser) took 4365.37 ms. Allocated memory is still 154.1 MB. Free memory was 129.6 MB in the beginning and 52.1 MB in the end (delta: 77.6 MB). Peak memory consumption was 78.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:44,522 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:44,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.69 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 120.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:44,524 INFO L168 Benchmark]: Boogie Preprocessor took 34.18 ms. Allocated memory is still 154.1 MB. Free memory was 119.9 MB in the beginning and 118.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:44,525 INFO L168 Benchmark]: RCFGBuilder took 493.49 ms. Allocated memory is still 154.1 MB. Free memory was 118.6 MB in the beginning and 106.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:44,526 INFO L168 Benchmark]: TraceAbstraction took 3570.50 ms. Allocated memory is still 154.1 MB. Free memory was 106.3 MB in the beginning and 52.1 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:44,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.69 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 120.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.18 ms. Allocated memory is still 154.1 MB. Free memory was 119.9 MB in the beginning and 118.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 493.49 ms. Allocated memory is still 154.1 MB. Free memory was 118.6 MB in the beginning and 106.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3570.50 ms. Allocated memory is still 154.1 MB. Free memory was 106.3 MB in the beginning and 52.1 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.4 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: 16]: Loop Invariant Derived loop invariant: y == 0 || x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 28 SDslu, 82 SDs, 0 SdLazy, 75 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 25 NumberOfFragments, 50 HoareAnnotationTreeSize, 21 FomulaSimplifications, 83 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 161 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 108 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 4168 SizeOfPredicates, 4 NumberOfNonLiveVariables, 295 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 6/20 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...