/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 0.1.25-8fc6572 [2020-07-10 15:28:04,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 15:28:04,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 15:28:04,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 15:28:04,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 15:28:04,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 15:28:04,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 15:28:04,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 15:28:04,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 15:28:04,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 15:28:04,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 15:28:04,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 15:28:04,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 15:28:04,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 15:28:04,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 15:28:04,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 15:28:04,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 15:28:04,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 15:28:04,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 15:28:04,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 15:28:04,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 15:28:04,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 15:28:04,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 15:28:04,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 15:28:04,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 15:28:04,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 15:28:04,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 15:28:04,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 15:28:04,697 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 [2020-07-10 15:28:04,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 15:28:04,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 15:28:04,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-10 15:28:04,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-10 15:28:04,714 INFO L138 SettingsManager]: * Use SBE=true [2020-07-10 15:28:04,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 15:28:04,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 15:28:04,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 15:28:04,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 15:28:04,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 15:28:04,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 15:28:04,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 15:28:04,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 15:28:04,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 15:28:04,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 15:28:04,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 15:28:04,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 15:28:04,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 15:28:04,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-10 15:28:04,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 15:28:04,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 15:28:04,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 15:28:04,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 15:28:04,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-10 15:28:04,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-10 15:28:04,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-10 15:28:04,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-10 15:28:04,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 15:28:04,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-10 15:28:04,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-10 15:28:04,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 15:28:04,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 15:28:04,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 15:28:04,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 15:28:04,997 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 15:28:04,998 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-10 15:28:05,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d93e3c22/45ab8a4c76dd4cd4bdebe6ba1cc7172e/FLAG0c51d0aca [2020-07-10 15:28:05,554 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 15:28:05,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-10 15:28:05,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d93e3c22/45ab8a4c76dd4cd4bdebe6ba1cc7172e/FLAG0c51d0aca [2020-07-10 15:28:05,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d93e3c22/45ab8a4c76dd4cd4bdebe6ba1cc7172e [2020-07-10 15:28:05,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 15:28:05,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 15:28:05,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 15:28:05,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 15:28:05,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 15:28:05,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 03:28:05" (1/1) ... [2020-07-10 15:28:05,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b09f6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:05, skipping insertion in model container [2020-07-10 15:28:05,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 03:28:05" (1/1) ... [2020-07-10 15:28:05,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 15:28:06,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 15:28:06,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 15:28:06,192 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 15:28:06,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 15:28:06,224 INFO L208 MainTranslator]: Completed translation [2020-07-10 15:28:06,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06 WrapperNode [2020-07-10 15:28:06,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 15:28:06,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 15:28:06,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 15:28:06,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 15:28:06,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (1/1) ... [2020-07-10 15:28:06,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 15:28:06,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 15:28:06,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 15:28:06,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 15:28:06,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (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 [2020-07-10 15:28:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 15:28:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 15:28:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-10 15:28:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-10 15:28:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 15:28:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 15:28:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-10 15:28:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-10 15:28:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 15:28:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 15:28:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 15:28:06,646 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 15:28:06,647 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-10 15:28:06,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 03:28:06 BoogieIcfgContainer [2020-07-10 15:28:06,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 15:28:06,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 15:28:06,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 15:28:06,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 15:28:06,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 03:28:05" (1/3) ... [2020-07-10 15:28:06,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea42092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 03:28:06, skipping insertion in model container [2020-07-10 15:28:06,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:28:06" (2/3) ... [2020-07-10 15:28:06,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea42092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 03:28:06, skipping insertion in model container [2020-07-10 15:28:06,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 03:28:06" (3/3) ... [2020-07-10 15:28:06,669 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-07-10 15:28:06,680 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-10 15:28:06,689 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 15:28:06,702 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 15:28:06,721 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 15:28:06,722 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 15:28:06,722 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-10 15:28:06,722 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 15:28:06,722 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 15:28:06,722 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 15:28:06,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 15:28:06,723 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 15:28:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-10 15:28:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-10 15:28:06,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:28:06,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:28:06,747 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:28:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:28:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-07-10 15:28:06,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:28:06,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863393066] [2020-07-10 15:28:06,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:28:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:28:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:28:06,933 INFO L280 TraceCheckUtils]: 0: Hoare triple {31#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {26#true} is VALID [2020-07-10 15:28:06,933 INFO L280 TraceCheckUtils]: 1: Hoare triple {26#true} assume true; {26#true} is VALID [2020-07-10 15:28:06,934 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {26#true} {26#true} #45#return; {26#true} is VALID [2020-07-10 15:28:06,937 INFO L263 TraceCheckUtils]: 0: Hoare triple {26#true} call ULTIMATE.init(); {31#(= ~x~0 |old(~x~0)|)} is VALID [2020-07-10 15:28:06,937 INFO L280 TraceCheckUtils]: 1: Hoare triple {31#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {26#true} is VALID [2020-07-10 15:28:06,937 INFO L280 TraceCheckUtils]: 2: Hoare triple {26#true} assume true; {26#true} is VALID [2020-07-10 15:28:06,938 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {26#true} {26#true} #45#return; {26#true} is VALID [2020-07-10 15:28:06,938 INFO L263 TraceCheckUtils]: 4: Hoare triple {26#true} call #t~ret0 := main(); {26#true} is VALID [2020-07-10 15:28:06,939 INFO L280 TraceCheckUtils]: 5: Hoare triple {26#true} assume false; {27#false} is VALID [2020-07-10 15:28:06,940 INFO L263 TraceCheckUtils]: 6: Hoare triple {27#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {27#false} is VALID [2020-07-10 15:28:06,940 INFO L280 TraceCheckUtils]: 7: Hoare triple {27#false} ~cond := #in~cond; {27#false} is VALID [2020-07-10 15:28:06,940 INFO L280 TraceCheckUtils]: 8: Hoare triple {27#false} assume 0 == ~cond; {27#false} is VALID [2020-07-10 15:28:06,941 INFO L280 TraceCheckUtils]: 9: Hoare triple {27#false} assume !false; {27#false} is VALID [2020-07-10 15:28:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 15:28:06,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863393066] [2020-07-10 15:28:06,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 15:28:06,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-10 15:28:06,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3235590] [2020-07-10 15:28:06,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-10 15:28:06,954 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 15:28:06,957 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-10 15:28:06,987 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:28:06,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-10 15:28:06,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-10 15:28:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-10 15:28:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-10 15:28:06,998 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-07-10 15:28:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:28:07,155 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2020-07-10 15:28:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-10 15:28:07,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-10 15:28:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 15:28:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-10 15:28:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2020-07-10 15:28:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-10 15:28:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2020-07-10 15:28:07,174 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 53 transitions. [2020-07-10 15:28:07,277 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 53 edges. 53 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:28:07,289 INFO L225 Difference]: With dead ends: 37 [2020-07-10 15:28:07,289 INFO L226 Difference]: Without dead ends: 19 [2020-07-10 15:28:07,294 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 [2020-07-10 15:28:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-10 15:28:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-07-10 15:28:07,342 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 15:28:07,343 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand 17 states. [2020-07-10 15:28:07,343 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand 17 states. [2020-07-10 15:28:07,344 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 17 states. [2020-07-10 15:28:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:28:07,349 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-10 15:28:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-10 15:28:07,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:28:07,350 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:28:07,351 INFO L74 IsIncluded]: Start isIncluded. First operand 17 states. Second operand 19 states. [2020-07-10 15:28:07,351 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 19 states. [2020-07-10 15:28:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:28:07,355 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-10 15:28:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-10 15:28:07,356 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:28:07,356 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:28:07,356 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 15:28:07,357 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 15:28:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-10 15:28:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-10 15:28:07,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-07-10 15:28:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 15:28:07,361 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-10 15:28:07,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-10 15:28:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-10 15:28:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-10 15:28:07,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:28:07,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:28:07,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 15:28:07,363 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:28:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:28:07,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-07-10 15:28:07,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:28:07,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811005458] [2020-07-10 15:28:07,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:28:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 15:28:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 15:28:07,419 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-10 15:28:07,420 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-10 15:28:07,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 15:28:07,441 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-10 15:28:07,442 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-10 15:28:07,442 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-10 15:28:07,442 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-10 15:28:07,442 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 15:28:07,443 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 15:28:07,443 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-10 15:28:07,443 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-10 15:28:07,443 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-10 15:28:07,443 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-10 15:28:07,443 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L14-1 has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-10 15:28:07,444 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-10 15:28:07,445 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-10 15:28:07,445 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-10 15:28:07,445 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-10 15:28:07,445 WARN L170 areAnnotationChecker]: evalEXIT has no Hoare annotation [2020-07-10 15:28:07,445 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-10 15:28:07,445 WARN L170 areAnnotationChecker]: L30 has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-10 15:28:07,446 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-10 15:28:07,447 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-10 15:28:07,447 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-10 15:28:07,447 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. [2020-07-10 15:28:07,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.07 03:28:07 BoogieIcfgContainer [2020-07-10 15:28:07,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-10 15:28:07,453 INFO L168 Benchmark]: Toolchain (without parser) took 1471.44 ms. Allocated memory was 134.2 MB in the beginning and 198.7 MB in the end (delta: 64.5 MB). Free memory was 98.8 MB in the beginning and 109.7 MB in the end (delta: -10.8 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-07-10 15:28:07,454 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.2 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 15:28:07,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 134.2 MB. Free memory was 98.4 MB in the beginning and 89.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-10 15:28:07,456 INFO L168 Benchmark]: Boogie Preprocessor took 118.38 ms. Allocated memory was 134.2 MB in the beginning and 198.7 MB in the end (delta: 64.5 MB). Free memory was 89.0 MB in the beginning and 177.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-10 15:28:07,457 INFO L168 Benchmark]: RCFGBuilder took 307.28 ms. Allocated memory is still 198.7 MB. Free memory was 177.2 MB in the beginning and 163.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-10 15:28:07,458 INFO L168 Benchmark]: TraceAbstraction took 792.20 ms. Allocated memory is still 198.7 MB. Free memory was 162.3 MB in the beginning and 109.7 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-07-10 15:28:07,461 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 0.23 ms. Allocated memory is still 134.2 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 134.2 MB. Free memory was 98.4 MB in the beginning and 89.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.38 ms. Allocated memory was 134.2 MB in the beginning and 198.7 MB in the end (delta: 64.5 MB). Free memory was 89.0 MB in the beginning and 177.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 307.28 ms. Allocated memory is still 198.7 MB. Free memory was 177.2 MB in the beginning and 163.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 792.20 ms. Allocated memory is still 198.7 MB. Free memory was 162.3 MB in the beginning and 109.7 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 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...