/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/for_infinite_loop_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:42:54,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:42:54,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:42:54,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:42:54,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:42:54,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:42:54,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:42:54,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:42:54,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:42:54,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:42:54,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:42:54,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:42:54,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:42:54,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:42:54,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:42:54,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:42:54,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:42:54,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:42:54,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:42:54,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:42:54,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:42:54,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:42:54,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:42:55,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:42:55,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:42:55,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:42:55,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:42:55,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:42:55,017 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 [2020-10-23 18:42:55,077 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:42:55,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:42:55,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:42:55,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:42:55,081 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:42:55,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:42:55,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:42:55,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:42:55,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:42:55,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:42:55,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:42:55,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:42:55,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:42:55,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:42:55,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:42:55,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:42:55,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:42:55,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:42:55,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:42:55,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:42:55,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:42:55,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:42:55,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:42:55,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:42:55,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:42:55,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:42:55,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:42:55,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:42:55,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:42:55,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:42:55,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:42:55,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:42:55,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:42:55,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:42:55,546 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:42:55,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_2.c [2020-10-23 18:42:55,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6c0f1d3/ad4630e502a34994bd5db55546e63db4/FLAG37ddc0b04 [2020-10-23 18:42:56,242 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:42:56,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_2.c [2020-10-23 18:42:56,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6c0f1d3/ad4630e502a34994bd5db55546e63db4/FLAG37ddc0b04 [2020-10-23 18:42:56,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6c0f1d3/ad4630e502a34994bd5db55546e63db4 [2020-10-23 18:42:56,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:42:56,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:42:56,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:56,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:42:56,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:42:56,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64426298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56, skipping insertion in model container [2020-10-23 18:42:56,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:42:56,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:42:56,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:56,885 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:42:56,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:56,920 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:42:56,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56 WrapperNode [2020-10-23 18:42:56,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:56,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:42:56,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:42:56,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:42:56,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (1/1) ... [2020-10-23 18:42:56,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:42:56,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:42:56,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:42:56,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:42:56,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (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 [2020-10-23 18:42:57,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:42:57,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:42:57,043 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:42:57,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:42:57,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:42:57,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:42:57,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:42:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:42:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:42:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:42:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:42:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:42:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:42:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:42:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:42:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:42:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:42:57,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:42:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:42:57,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:42:57,360 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:42:57,360 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:42:57,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:57 BoogieIcfgContainer [2020-10-23 18:42:57,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:42:57,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:42:57,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:42:57,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:42:57,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:42:56" (1/3) ... [2020-10-23 18:42:57,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189320c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:57, skipping insertion in model container [2020-10-23 18:42:57,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:56" (2/3) ... [2020-10-23 18:42:57,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189320c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:57, skipping insertion in model container [2020-10-23 18:42:57,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:57" (3/3) ... [2020-10-23 18:42:57,373 INFO L111 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_2.c [2020-10-23 18:42:57,386 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:42:57,392 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:42:57,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:42:57,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:42:57,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:42:57,505 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:42:57,505 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:42:57,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:42:57,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:42:57,506 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:42:57,506 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:42:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:42:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:42:57,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:57,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:57,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash 211868033, now seen corresponding path program 1 times [2020-10-23 18:42:57,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:57,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819412508] [2020-10-23 18:42:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:57,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:57,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819412508] [2020-10-23 18:42:57,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:57,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:42:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189978764] [2020-10-23 18:42:57,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:42:57,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:42:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:42:57,984 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-23 18:42:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:58,085 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-23 18:42:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:42:58,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-23 18:42:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:58,097 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:42:58,097 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:42:58,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:42:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:42:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:42:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:42:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-23 18:42:58,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-10-23 18:42:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:58,147 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-23 18:42:58,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:42:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-23 18:42:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:42:58,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:58,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:58,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:42:58,149 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:58,150 INFO L82 PathProgramCache]: Analyzing trace with hash 267279293, now seen corresponding path program 1 times [2020-10-23 18:42:58,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:58,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738696634] [2020-10-23 18:42:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:58,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:58,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738696634] [2020-10-23 18:42:58,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:58,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:42:58,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628492493] [2020-10-23 18:42:58,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:42:58,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:42:58,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:42:58,392 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-23 18:42:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:58,651 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-23 18:42:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:42:58,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-23 18:42:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:58,653 INFO L225 Difference]: With dead ends: 17 [2020-10-23 18:42:58,653 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:42:58,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:42:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:42:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:42:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:42:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:42:58,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-10-23 18:42:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:58,655 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:42:58,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:42:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:42:58,656 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:42:58,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:42:58,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:42:58,769 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:42:58,770 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:42:58,770 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:42:58,770 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:42:58,770 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:42:58,771 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:42:58,771 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:42:58,771 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:42:58,771 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:42:58,771 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:42:58,771 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:42:58,772 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:42:58,772 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-23 18:42:58,772 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:42:58,772 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:42:58,772 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 18 28) the Hoare annotation is: true [2020-10-23 18:42:58,772 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (= main_~x~0 0) [2020-10-23 18:42:58,773 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 18 28) no Hoare annotation was computed. [2020-10-23 18:42:58,773 INFO L274 CegarLoopResult]: For program point L25-1(lines 23 26) no Hoare annotation was computed. [2020-10-23 18:42:58,773 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-23 18:42:58,773 INFO L270 CegarLoopResult]: At program point L23-2(lines 23 26) the Hoare annotation is: (= main_~x~0 0) [2020-10-23 18:42:58,773 INFO L270 CegarLoopResult]: At program point L23-3(lines 23 26) the Hoare annotation is: false [2020-10-23 18:42:58,773 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 18 28) no Hoare annotation was computed. [2020-10-23 18:42:58,773 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2020-10-23 18:42:58,774 INFO L270 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:42:58,774 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-10-23 18:42:58,774 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-23 18:42:58,774 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 14) no Hoare annotation was computed. [2020-10-23 18:42:58,774 INFO L274 CegarLoopResult]: For program point L10-2(lines 9 14) no Hoare annotation was computed. [2020-10-23 18:42:58,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:42:58 BoogieIcfgContainer [2020-10-23 18:42:58,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:42:58,799 INFO L168 Benchmark]: Toolchain (without parser) took 2150.57 ms. Allocated memory is still 152.0 MB. Free memory was 127.9 MB in the beginning and 115.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:58,800 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 131.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:42:58,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.05 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 118.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:58,803 INFO L168 Benchmark]: Boogie Preprocessor took 36.45 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:58,804 INFO L168 Benchmark]: RCFGBuilder took 403.35 ms. Allocated memory is still 152.0 MB. Free memory was 116.6 MB in the beginning and 103.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:58,805 INFO L168 Benchmark]: TraceAbstraction took 1429.60 ms. Allocated memory is still 152.0 MB. Free memory was 103.1 MB in the beginning and 115.2 MB in the end (delta: -12.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:42:58,811 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 131.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.05 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 118.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.45 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.35 ms. Allocated memory is still 152.0 MB. Free memory was 116.6 MB in the beginning and 103.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1429.60 ms. Allocated memory is still 152.0 MB. Free memory was 103.1 MB in the beginning and 115.2 MB in the end (delta: -12.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 24 SDslu, 19 SDs, 0 SdLazy, 25 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 15 PreInvPairs, 17 NumberOfFragments, 46 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1152 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...