/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 22:50:51,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 22:50:51,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 22:50:51,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 22:50:51,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 22:50:51,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 22:50:51,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 22:50:51,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 22:50:51,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 22:50:51,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 22:50:51,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 22:50:51,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 22:50:51,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 22:50:51,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 22:50:51,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 22:50:51,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 22:50:51,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 22:50:51,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 22:50:51,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 22:50:51,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 22:50:51,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 22:50:51,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 22:50:51,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 22:50:51,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 22:50:51,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 22:50:51,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 22:50:51,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 22:50:51,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 22:50:51,996 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 [2020-07-17 22:50:52,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 22:50:52,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 22:50:52,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 22:50:52,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 22:50:52,029 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 22:50:52,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 22:50:52,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 22:50:52,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 22:50:52,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 22:50:52,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 22:50:52,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 22:50:52,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 22:50:52,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 22:50:52,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 22:50:52,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 22:50:52,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 22:50:52,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 22:50:52,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 22:50:52,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 22:50:52,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 22:50:52,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 22:50:52,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 22:50:52,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 22:50:52,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 22:50:52,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 22:50:52,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 22:50:52,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 22:50:52,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 22:50:52,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 22:50:52,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 22:50:52,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 22:50:52,366 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 22:50:52,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 22:50:52,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 22:50:52,370 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 22:50:52,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-17 22:50:52,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4c65b1cd/5a21d5af5f5c498bae17aae35106522c/FLAGd63902403 [2020-07-17 22:50:52,878 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 22:50:52,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-17 22:50:52,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4c65b1cd/5a21d5af5f5c498bae17aae35106522c/FLAGd63902403 [2020-07-17 22:50:53,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4c65b1cd/5a21d5af5f5c498bae17aae35106522c [2020-07-17 22:50:53,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 22:50:53,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 22:50:53,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 22:50:53,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 22:50:53,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 22:50:53,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444327e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53, skipping insertion in model container [2020-07-17 22:50:53,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 22:50:53,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 22:50:53,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:50:53,584 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 22:50:53,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:50:53,628 INFO L208 MainTranslator]: Completed translation [2020-07-17 22:50:53,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53 WrapperNode [2020-07-17 22:50:53,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 22:50:53,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 22:50:53,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 22:50:53,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 22:50:53,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (1/1) ... [2020-07-17 22:50:53,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 22:50:53,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 22:50:53,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 22:50:53,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 22:50:53,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (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 [2020-07-17 22:50:53,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 22:50:53,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 22:50:53,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 22:50:53,794 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-17 22:50:53,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 22:50:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 22:50:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 22:50:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-17 22:50:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 22:50:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 22:50:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 22:50:53,992 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 22:50:53,992 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 22:50:53,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:50:53 BoogieIcfgContainer [2020-07-17 22:50:53,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 22:50:53,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 22:50:53,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 22:50:54,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 22:50:54,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 10:50:53" (1/3) ... [2020-07-17 22:50:54,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3962bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:50:54, skipping insertion in model container [2020-07-17 22:50:54,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:53" (2/3) ... [2020-07-17 22:50:54,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3962bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:50:54, skipping insertion in model container [2020-07-17 22:50:54,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:50:53" (3/3) ... [2020-07-17 22:50:54,004 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-07-17 22:50:54,027 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 22:50:54,036 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 22:50:54,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 22:50:54,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 22:50:54,099 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 22:50:54,099 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 22:50:54,099 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 22:50:54,099 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 22:50:54,100 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 22:50:54,100 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 22:50:54,100 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 22:50:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-17 22:50:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 22:50:54,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:50:54,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:50:54,130 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:50:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:50:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-07-17 22:50:54,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:50:54,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432650836] [2020-07-17 22:50:54,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:50:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:50:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:50:54,336 INFO L280 TraceCheckUtils]: 0: Hoare triple {31#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {26#true} is VALID [2020-07-17 22:50:54,337 INFO L280 TraceCheckUtils]: 1: Hoare triple {26#true} assume true; {26#true} is VALID [2020-07-17 22:50:54,337 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {26#true} {26#true} #45#return; {26#true} is VALID [2020-07-17 22:50:54,340 INFO L263 TraceCheckUtils]: 0: Hoare triple {26#true} call ULTIMATE.init(); {31#(= ~x~0 |old(~x~0)|)} is VALID [2020-07-17 22:50:54,341 INFO L280 TraceCheckUtils]: 1: Hoare triple {31#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {26#true} is VALID [2020-07-17 22:50:54,341 INFO L280 TraceCheckUtils]: 2: Hoare triple {26#true} assume true; {26#true} is VALID [2020-07-17 22:50:54,341 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {26#true} {26#true} #45#return; {26#true} is VALID [2020-07-17 22:50:54,342 INFO L263 TraceCheckUtils]: 4: Hoare triple {26#true} call #t~ret0 := main(); {26#true} is VALID [2020-07-17 22:50:54,343 INFO L280 TraceCheckUtils]: 5: Hoare triple {26#true} assume false; {27#false} is VALID [2020-07-17 22:50:54,344 INFO L263 TraceCheckUtils]: 6: Hoare triple {27#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {27#false} is VALID [2020-07-17 22:50:54,344 INFO L280 TraceCheckUtils]: 7: Hoare triple {27#false} ~cond := #in~cond; {27#false} is VALID [2020-07-17 22:50:54,344 INFO L280 TraceCheckUtils]: 8: Hoare triple {27#false} assume 0 == ~cond; {27#false} is VALID [2020-07-17 22:50:54,345 INFO L280 TraceCheckUtils]: 9: Hoare triple {27#false} assume !false; {27#false} is VALID [2020-07-17 22:50:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:50:54,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432650836] [2020-07-17 22:50:54,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 22:50:54,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 22:50:54,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451244195] [2020-07-17 22:50:54,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-17 22:50:54,362 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:50:54,366 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-17 22:50:54,405 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:50:54,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 22:50:54,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:50:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 22:50:54,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 22:50:54,417 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-07-17 22:50:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:50:54,580 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2020-07-17 22:50:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 22:50:54,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-17 22:50:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:50:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-17 22:50:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2020-07-17 22:50:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-17 22:50:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2020-07-17 22:50:54,599 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 53 transitions. [2020-07-17 22:50:54,695 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 53 edges. 53 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:50:54,707 INFO L225 Difference]: With dead ends: 37 [2020-07-17 22:50:54,707 INFO L226 Difference]: Without dead ends: 19 [2020-07-17 22:50:54,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 22:50:54,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-17 22:50:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-07-17 22:50:54,755 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:50:54,756 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand 17 states. [2020-07-17 22:50:54,757 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand 17 states. [2020-07-17 22:50:54,757 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 17 states. [2020-07-17 22:50:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:50:54,762 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-17 22:50:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-17 22:50:54,763 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:50:54,763 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:50:54,763 INFO L74 IsIncluded]: Start isIncluded. First operand 17 states. Second operand 19 states. [2020-07-17 22:50:54,764 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 19 states. [2020-07-17 22:50:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:50:54,768 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-17 22:50:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-17 22:50:54,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:50:54,769 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:50:54,770 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:50:54,770 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:50:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-17 22:50:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-17 22:50:54,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-07-17 22:50:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:50:54,774 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-17 22:50:54,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 22:50:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-17 22:50:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 22:50:54,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:50:54,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:50:54,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 22:50:54,776 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:50:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:50:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-07-17 22:50:54,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:50:54,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032614693] [2020-07-17 22:50:54,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:50:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 22:50:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 22:50:54,829 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 22:50:54,830 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 22:50:54,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 22:50:54,851 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-17 22:50:54,851 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-17 22:50:54,851 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-17 22:50:54,851 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-17 22:50:54,851 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-17 22:50:54,852 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-17 22:50:54,852 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-17 22:50:54,852 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-17 22:50:54,852 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-17 22:50:54,852 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-17 22:50:54,852 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-17 22:50:54,853 WARN L170 areAnnotationChecker]: L14-1 has no Hoare annotation [2020-07-17 22:50:54,853 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-17 22:50:54,853 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-17 22:50:54,853 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-17 22:50:54,853 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-17 22:50:54,853 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-17 22:50:54,854 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-17 22:50:54,854 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-17 22:50:54,854 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-17 22:50:54,854 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-17 22:50:54,857 WARN L170 areAnnotationChecker]: evalEXIT has no Hoare annotation [2020-07-17 22:50:54,857 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-17 22:50:54,857 WARN L170 areAnnotationChecker]: L30 has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-17 22:50:54,858 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-17 22:50:54,859 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-17 22:50:54,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 10:50:54 BoogieIcfgContainer [2020-07-17 22:50:54,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 22:50:54,867 INFO L168 Benchmark]: Toolchain (without parser) took 1564.77 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.9 MB in the beginning and 114.8 MB in the end (delta: -10.8 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:54,869 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 22:50:54,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.97 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 94.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:54,873 INFO L168 Benchmark]: Boogie Preprocessor took 105.47 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 94.0 MB in the beginning and 182.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:54,874 INFO L168 Benchmark]: RCFGBuilder took 261.35 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 168.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:54,875 INFO L168 Benchmark]: TraceAbstraction took 866.28 ms. Allocated memory is still 203.4 MB. Free memory was 167.8 MB in the beginning and 114.8 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:54,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 324.97 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 94.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.47 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 94.0 MB in the beginning and 182.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.35 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 168.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 866.28 ms. Allocated memory is still 203.4 MB. Free memory was 167.8 MB in the beginning and 114.8 MB in the end (delta: 53.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; VAL [\old(x)=2, x=0] [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 [L15] x=1 VAL [\old(x)=0, x=1] [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 6 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...