/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 0.2.1-dev-a47f07a [2021-04-15 23:06:37,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 23:06:37,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 23:06:37,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 23:06:37,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 23:06:37,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 23:06:37,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 23:06:37,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 23:06:37,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 23:06:37,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 23:06:37,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 23:06:37,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 23:06:37,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 23:06:37,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 23:06:37,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 23:06:37,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 23:06:37,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 23:06:37,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 23:06:37,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 23:06:37,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 23:06:37,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 23:06:37,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 23:06:37,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 23:06:37,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 23:06:37,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 23:06:37,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 23:06:37,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 23:06:37,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 23:06:37,275 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 [2021-04-15 23:06:37,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 23:06:37,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 23:06:37,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 23:06:37,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 23:06:37,316 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 23:06:37,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 23:06:37,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 23:06:37,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 23:06:37,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 23:06:37,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 23:06:37,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 23:06:37,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 23:06:37,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 23:06:37,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 23:06:37,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 23:06:37,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 23:06:37,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 23:06:37,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 23:06:37,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 23:06:37,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 23:06:37,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 23:06:37,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 23:06:37,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 23:06:37,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 23:06:37,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 23:06:37,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 23:06:37,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 23:06:37,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-15 23:06:37,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 23:06:37,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 23:06:37,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 23:06:37,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 23:06:37,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 23:06:37,729 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 23:06:37,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2021-04-15 23:06:37,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e393dfd/026e8172eb13410383db2c7e5fdd6e15/FLAGde833fb3a [2021-04-15 23:06:38,362 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 23:06:38,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2021-04-15 23:06:38,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e393dfd/026e8172eb13410383db2c7e5fdd6e15/FLAGde833fb3a [2021-04-15 23:06:38,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e393dfd/026e8172eb13410383db2c7e5fdd6e15 [2021-04-15 23:06:38,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 23:06:38,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 23:06:38,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 23:06:38,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 23:06:38,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 23:06:38,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77be0e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38, skipping insertion in model container [2021-04-15 23:06:38,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 23:06:38,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 23:06:38,840 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/terminator_03-1.c[327,340] [2021-04-15 23:06:38,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:06:38,858 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 23:06:38,869 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/terminator_03-1.c[327,340] [2021-04-15 23:06:38,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:06:38,884 INFO L208 MainTranslator]: Completed translation [2021-04-15 23:06:38,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38 WrapperNode [2021-04-15 23:06:38,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 23:06:38,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 23:06:38,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 23:06:38,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 23:06:38,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (1/1) ... [2021-04-15 23:06:38,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 23:06:38,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 23:06:38,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 23:06:38,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 23:06:38,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (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 [2021-04-15 23:06:39,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-15 23:06:39,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 23:06:39,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-15 23:06:39,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-15 23:06:39,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-15 23:06:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-15 23:06:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-15 23:06:39,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-15 23:06:39,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 23:06:39,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-15 23:06:39,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-15 23:06:39,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-15 23:06:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-15 23:06:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 23:06:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 23:06:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 23:06:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 23:06:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 23:06:39,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 23:06:39,358 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-15 23:06:39,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:06:39 BoogieIcfgContainer [2021-04-15 23:06:39,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 23:06:39,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 23:06:39,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 23:06:39,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 23:06:39,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 11:06:38" (1/3) ... [2021-04-15 23:06:39,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ed98b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:06:39, skipping insertion in model container [2021-04-15 23:06:39,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:38" (2/3) ... [2021-04-15 23:06:39,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ed98b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:06:39, skipping insertion in model container [2021-04-15 23:06:39,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:06:39" (3/3) ... [2021-04-15 23:06:39,368 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2021-04-15 23:06:39,374 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 23:06:39,377 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 23:06:39,394 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-15 23:06:39,414 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 23:06:39,415 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 23:06:39,415 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 23:06:39,415 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 23:06:39,415 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 23:06:39,415 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 23:06:39,415 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 23:06:39,415 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 23:06:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-15 23:06:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 23:06:39,434 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:06:39,435 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:06:39,435 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:06:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:06:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1706373939, now seen corresponding path program 1 times [2021-04-15 23:06:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:06:39,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111118828] [2021-04-15 23:06:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:06:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:06:39,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:39,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:39,686 INFO L142 QuantifierPusher]: treesize reduction 24, result has 4.0 percent of original size [2021-04-15 23:06:39,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:39,689 INFO L142 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-04-15 23:06:39,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:06:39,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:39,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 23:06:39,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:39,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 23:06:39,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:39,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:39,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:06:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:06:39,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:39,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:06:39,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111118828] [2021-04-15 23:06:39,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 23:06:39,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 23:06:39,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900271785] [2021-04-15 23:06:39,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 23:06:39,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:06:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 23:06:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 23:06:39,847 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:06:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:06:40,082 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-04-15 23:06:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 23:06:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-15 23:06:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:06:40,089 INFO L225 Difference]: With dead ends: 40 [2021-04-15 23:06:40,090 INFO L226 Difference]: Without dead ends: 13 [2021-04-15 23:06:40,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 23:06:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-04-15 23:06:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-04-15 23:06:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:06:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-04-15 23:06:40,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-04-15 23:06:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:06:40,123 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-04-15 23:06:40,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:06:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-04-15 23:06:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 23:06:40,124 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:06:40,124 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:06:40,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 23:06:40,125 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:06:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:06:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash 931642645, now seen corresponding path program 1 times [2021-04-15 23:06:40,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:06:40,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124851016] [2021-04-15 23:06:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:06:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 23:06:40,151 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 23:06:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 23:06:40,183 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 23:06:40,220 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-15 23:06:40,221 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-15 23:06:40,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 23:06:40,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 11:06:40 BoogieIcfgContainer [2021-04-15 23:06:40,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 23:06:40,256 INFO L168 Benchmark]: Toolchain (without parser) took 1566.81 ms. Allocated memory is still 202.4 MB. Free memory was 168.4 MB in the beginning and 169.1 MB in the end (delta: -733.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 23:06:40,257 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 202.4 MB. Free memory is still 184.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 23:06:40,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.95 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 158.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:40,258 INFO L168 Benchmark]: Boogie Preprocessor took 94.14 ms. Allocated memory is still 202.4 MB. Free memory was 158.9 MB in the beginning and 185.7 MB in the end (delta: -26.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:40,259 INFO L168 Benchmark]: RCFGBuilder took 373.59 ms. Allocated memory is still 202.4 MB. Free memory was 185.7 MB in the beginning and 173.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:40,259 INFO L168 Benchmark]: TraceAbstraction took 893.62 ms. Allocated memory is still 202.4 MB. Free memory was 172.6 MB in the beginning and 169.1 MB in the end (delta: 3.5 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:40,262 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 202.4 MB. Free memory is still 184.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 193.95 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 158.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 94.14 ms. Allocated memory is still 202.4 MB. Free memory was 158.9 MB in the beginning and 185.7 MB in the end (delta: -26.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 373.59 ms. Allocated memory is still 202.4 MB. Free memory was 185.7 MB in the beginning and 173.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 893.62 ms. Allocated memory is still 202.4 MB. Free memory was 172.6 MB in the beginning and 169.1 MB in the end (delta: 3.5 MB). Peak memory consumption was 5.1 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: [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] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 810.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 260.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 25 SDslu, 23 SDs, 0 SdLazy, 49 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 222.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.2ms SsaConstructionTime, 69.9ms SatisfiabilityAnalysisTime, 220.5ms InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 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...