/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/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:21,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:21,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:21,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:21,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:21,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:21,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:21,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:21,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:21,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:21,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:21,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:21,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:21,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:21,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:22,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:22,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:22,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:22,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:22,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:22,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:22,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:22,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:22,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:22,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:22,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:22,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:22,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:22,070 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 18:43:22,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:22,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:22,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:22,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:22,135 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:22,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:22,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:22,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:22,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:22,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:22,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:22,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:22,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:22,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:22,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:22,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:22,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:22,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:22,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:22,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:22,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:22,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:22,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:22,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:22,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:22,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:22,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:22,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:22,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:22,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:22,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:22,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:22,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:22,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:22,697 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:22,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-10-23 18:43:22,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f5fd63b/35ab7a94eac54939bfcf1c27b412d993/FLAG70e309a23 [2020-10-23 18:43:23,400 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:23,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2020-10-23 18:43:23,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f5fd63b/35ab7a94eac54939bfcf1c27b412d993/FLAG70e309a23 [2020-10-23 18:43:23,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f5fd63b/35ab7a94eac54939bfcf1c27b412d993 [2020-10-23 18:43:23,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:23,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:23,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:23,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:23,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:23,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:23" (1/1) ... [2020-10-23 18:43:23,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1546e479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:23, skipping insertion in model container [2020-10-23 18:43:23,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:23" (1/1) ... [2020-10-23 18:43:23,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:23,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:24,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:24,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:24,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:24,058 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:24,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24 WrapperNode [2020-10-23 18:43:24,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:24,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:24,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:24,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:24,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (1/1) ... [2020-10-23 18:43:24,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:24,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:24,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:24,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:24,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (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 18:43:24,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:24,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:24,185 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:24,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:24,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:24,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:24,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:24,186 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:24,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:24,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:24,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:43:24,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:24,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:24,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:24,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:24,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:24,456 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:24,456 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:24,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:24 BoogieIcfgContainer [2020-10-23 18:43:24,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:24,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:24,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:24,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:24,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:23" (1/3) ... [2020-10-23 18:43:24,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e88d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:24, skipping insertion in model container [2020-10-23 18:43:24,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:24" (2/3) ... [2020-10-23 18:43:24,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e88d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:24, skipping insertion in model container [2020-10-23 18:43:24,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:24" (3/3) ... [2020-10-23 18:43:24,469 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-10-23 18:43:24,486 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:24,495 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:24,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:24,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:24,607 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:24,607 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:24,607 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:24,607 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:24,608 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:24,608 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:24,608 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-23 18:43:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:43:24,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:24,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:24,647 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:24,657 INFO L82 PathProgramCache]: Analyzing trace with hash 346045792, now seen corresponding path program 1 times [2020-10-23 18:43:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:24,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482187880] [2020-10-23 18:43:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:25,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:25,058 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 18:43:25,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482187880] [2020-10-23 18:43:25,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:25,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:25,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225502153] [2020-10-23 18:43:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:25,083 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-23 18:43:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:25,391 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-23 18:43:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:25,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-23 18:43:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:25,401 INFO L225 Difference]: With dead ends: 45 [2020-10-23 18:43:25,401 INFO L226 Difference]: Without dead ends: 14 [2020-10-23 18:43:25,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-23 18:43:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-23 18:43:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-23 18:43:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-23 18:43:25,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-23 18:43:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:25,450 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-23 18:43:25,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-23 18:43:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:25,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:25,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:25,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:25,453 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1805776447, now seen corresponding path program 1 times [2020-10-23 18:43:25,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:25,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936657361] [2020-10-23 18:43:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:25,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:25,510 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:25,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:25,538 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:25,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:25,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:25 BoogieIcfgContainer [2020-10-23 18:43:25,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:25,572 INFO L168 Benchmark]: Toolchain (without parser) took 1816.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 76.4 MB in the end (delta: 49.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:25,573 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:25,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.41 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:25,575 INFO L168 Benchmark]: Boogie Preprocessor took 36.63 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:25,576 INFO L168 Benchmark]: RCFGBuilder took 361.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 102.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:25,577 INFO L168 Benchmark]: TraceAbstraction took 1108.62 ms. Allocated memory is still 151.0 MB. Free memory was 102.5 MB in the beginning and 76.4 MB in the end (delta: 26.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:25,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.41 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.63 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 361.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 102.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1108.62 ms. Allocated memory is still 151.0 MB. Free memory was 102.5 MB in the beginning and 76.4 MB in the end (delta: 26.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int x=__VERIFIER_nondet_int(); [L16] int y=__VERIFIER_nondet_int(); [L18] COND TRUE y>0 VAL [x=100, y=6] [L20] COND FALSE !(x<100) VAL [x=100, y=6] [L25] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] CALL reach_error() [L3] __assert_fail("0", "terminator_03-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 25 SDslu, 26 SDs, 0 SdLazy, 49 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 539 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...