/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:52:55,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:52:55,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:52:55,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 13:52:55,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 13:52:55,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 13:52:55,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 13:52:55,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 13:52:55,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 13:52:55,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 13:52:55,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 13:52:55,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 13:52:55,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:52:55,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:52:55,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:52:55,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:52:55,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:52:55,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:52:55,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:52:55,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:52:55,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:52:55,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:52:55,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:52:55,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:52:55,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:52:55,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:52:56,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:52:56,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:52:56,006 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 [2021-02-23 13:52:56,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:52:56,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:52:56,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:52:56,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:52:56,059 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:52:56,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:52:56,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:52:56,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:52:56,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:52:56,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:52:56,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:52:56,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:52:56,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:52:56,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:52:56,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:52:56,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:52:56,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:52:56,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:52:56,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:52:56,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:52:56,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:52:56,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:52:56,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:52:56,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:52:56,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:52:56,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:52:56,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:52:56,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:52:56,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:52:56,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:52:56,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:52:56,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:52:56,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:52:56,528 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:52:56,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2021-02-23 13:52:56,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143a10b4a/dc66d30e07a946ddbd47ace76a0d6fdf/FLAGc0e075e43 [2021-02-23 13:52:57,279 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:52:57,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c [2021-02-23 13:52:57,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143a10b4a/dc66d30e07a946ddbd47ace76a0d6fdf/FLAGc0e075e43 [2021-02-23 13:52:57,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143a10b4a/dc66d30e07a946ddbd47ace76a0d6fdf [2021-02-23 13:52:57,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:52:57,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:52:57,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:52:57,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:52:57,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:52:57,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9473ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57, skipping insertion in model container [2021-02-23 13:52:57,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:52:57,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:52:57,886 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c[320,333] [2021-02-23 13:52:57,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:52:57,915 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:52:57,930 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c[320,333] [2021-02-23 13:52:57,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:52:57,954 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:52:57,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57 WrapperNode [2021-02-23 13:52:57,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:52:57,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:52:57,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:52:57,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:52:57,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (1/1) ... [2021-02-23 13:52:57,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:52:58,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:52:58,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:52:58,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:52:58,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (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 [2021-02-23 13:52:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:52:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:52:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:52:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 13:52:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-23 13:52:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:52:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:52:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:52:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:52:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:52:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 13:52:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 13:52:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:52:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-23 13:52:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:52:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:52:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:52:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:52:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:52:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:52:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:52:58,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:52:58,575 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 13:52:58,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:52:58 BoogieIcfgContainer [2021-02-23 13:52:58,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:52:58,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:52:58,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:52:58,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:52:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:52:57" (1/3) ... [2021-02-23 13:52:58,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd14b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:52:58, skipping insertion in model container [2021-02-23 13:52:58,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:57" (2/3) ... [2021-02-23 13:52:58,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd14b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:52:58, skipping insertion in model container [2021-02-23 13:52:58,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:52:58" (3/3) ... [2021-02-23 13:52:58,592 INFO L111 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2021-02-23 13:52:58,601 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:52:58,608 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:52:58,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:52:58,678 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:52:58,679 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:52:58,679 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:52:58,679 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:52:58,679 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:52:58,679 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:52:58,680 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:52:58,680 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:52:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-23 13:52:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-23 13:52:58,708 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:58,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:58,710 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash 172866924, now seen corresponding path program 1 times [2021-02-23 13:52:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:58,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407638152] [2021-02-23 13:52:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:59,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:59,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:59,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:59,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:59,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:59,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:52:59,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407638152] [2021-02-23 13:52:59,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:59,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 13:52:59,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601505609] [2021-02-23 13:52:59,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 13:52:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 13:52:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:52:59,211 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2021-02-23 13:52:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:59,340 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-02-23 13:52:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:52:59,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-02-23 13:52:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:59,359 INFO L225 Difference]: With dead ends: 46 [2021-02-23 13:52:59,359 INFO L226 Difference]: Without dead ends: 17 [2021-02-23 13:52:59,364 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 [2021-02-23 13:52:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-02-23 13:52:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-02-23 13:52:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-02-23 13:52:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-02-23 13:52:59,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-02-23 13:52:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:59,427 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-02-23 13:52:59,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 13:52:59,427 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-02-23 13:52:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-23 13:52:59,428 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:59,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:59,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:52:59,429 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:59,430 INFO L82 PathProgramCache]: Analyzing trace with hash 169172840, now seen corresponding path program 1 times [2021-02-23 13:52:59,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:59,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554637387] [2021-02-23 13:52:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:52:59,501 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:52:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:52:59,555 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:52:59,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:52:59,595 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:52:59,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:52:59,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:52:59 BoogieIcfgContainer [2021-02-23 13:52:59,641 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:52:59,644 INFO L168 Benchmark]: Toolchain (without parser) took 2006.87 ms. Allocated memory is still 164.6 MB. Free memory was 140.5 MB in the beginning and 112.0 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:59,645 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 164.6 MB. Free memory was 135.6 MB in the beginning and 135.5 MB in the end (delta: 73.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:52:59,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.59 ms. Allocated memory is still 164.6 MB. Free memory was 139.4 MB in the beginning and 129.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:59,647 INFO L168 Benchmark]: Boogie Preprocessor took 42.18 ms. Allocated memory is still 164.6 MB. Free memory was 129.3 MB in the beginning and 127.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:59,648 INFO L168 Benchmark]: RCFGBuilder took 578.39 ms. Allocated memory is still 164.6 MB. Free memory was 127.8 MB in the beginning and 145.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:59,649 INFO L168 Benchmark]: TraceAbstraction took 1060.33 ms. Allocated memory is still 164.6 MB. Free memory was 145.5 MB in the beginning and 112.0 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:59,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 164.6 MB. Free memory was 135.6 MB in the beginning and 135.5 MB in the end (delta: 73.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.59 ms. Allocated memory is still 164.6 MB. Free memory was 139.4 MB in the beginning and 129.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.18 ms. Allocated memory is still 164.6 MB. Free memory was 129.3 MB in the beginning and 127.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.39 ms. Allocated memory is still 164.6 MB. Free memory was 127.8 MB in the beginning and 145.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1060.33 ms. Allocated memory is still 164.6 MB. Free memory was 145.5 MB in the beginning and 112.0 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L36] _Bool c = __VERIFIER_nondet_bool(); [L37] COND TRUE \read(c) VAL [c=1] [L38] CALL f(1) VAL [\old(d)=1] [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; VAL [\old(d)=1, d=1, k=0, x=-2, y=-1, z=1] [L16] COND FALSE !(!(k <= 1073741823)) VAL [\old(d)=1, d=1, k=0, x=-2, y=-1, z=1] [L19] COND FALSE !(z < k) VAL [\old(d)=1, d=1, k=0, x=-2, y=-1, z=1] [L20] CALL __VERIFIER_assert(z>=2) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 6 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 616 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...