/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/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:44,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:44,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:44,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:44,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:44,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:44,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:44,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:44,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:44,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:44,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:44,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:44,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:44,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:44,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:44,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:44,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:44,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:44,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:44,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:44,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:44,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:44,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:44,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:44,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:44,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:44,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:44,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:44,925 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 18:43:44,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:44,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:44,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:44,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:44,954 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:44,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:44,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:44,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:44,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:44,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:44,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:44,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:44,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:44,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:44,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:44,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:44,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:44,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:44,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:44,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:44,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:44,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:44,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:44,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:44,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:44,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:44,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:44,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:44,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:44,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:45,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:45,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:45,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:45,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:45,391 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:45,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-23 18:43:45,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3a25e74/ca914d2abb0747b697b6a10b490bb775/FLAGc79c7d2aa [2020-10-23 18:43:46,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:46,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-23 18:43:46,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3a25e74/ca914d2abb0747b697b6a10b490bb775/FLAGc79c7d2aa [2020-10-23 18:43:46,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3a25e74/ca914d2abb0747b697b6a10b490bb775 [2020-10-23 18:43:46,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:46,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:46,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:46,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:46,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:46,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3cb0e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46, skipping insertion in model container [2020-10-23 18:43:46,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:46,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:46,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:46,694 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:46,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:46,729 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:46,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46 WrapperNode [2020-10-23 18:43:46,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:46,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:46,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:46,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:46,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (1/1) ... [2020-10-23 18:43:46,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:46,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:46,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:46,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:46,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (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 18:43:46,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:46,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:46,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:46,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:46,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:46,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:46,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:46,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:46,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:46,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:46,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:47,347 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:47,347 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:47,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:47 BoogieIcfgContainer [2020-10-23 18:43:47,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:47,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:47,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:47,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:47,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:46" (1/3) ... [2020-10-23 18:43:47,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf0507c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:47, skipping insertion in model container [2020-10-23 18:43:47,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:46" (2/3) ... [2020-10-23 18:43:47,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf0507c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:47, skipping insertion in model container [2020-10-23 18:43:47,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:47" (3/3) ... [2020-10-23 18:43:47,364 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-23 18:43:47,399 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:47,407 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:47,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:47,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:47,480 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:47,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:47,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:47,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:47,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:47,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:47,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-23 18:43:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:43:47,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:47,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:47,518 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-23 18:43:47,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:47,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371150105] [2020-10-23 18:43:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:47,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:47,810 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 18:43:47,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371150105] [2020-10-23 18:43:47,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:47,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946271357] [2020-10-23 18:43:47,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:47,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:47,843 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-23 18:43:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:47,965 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-23 18:43:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:47,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:43:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:47,992 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:43:47,993 INFO L226 Difference]: Without dead ends: 13 [2020-10-23 18:43:47,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-23 18:43:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-23 18:43:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-23 18:43:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-23 18:43:48,069 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-23 18:43:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:48,070 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-23 18:43:48,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-23 18:43:48,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:43:48,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:48,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:48,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:48,074 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-23 18:43:48,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895497009] [2020-10-23 18:43:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:48,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:48,327 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 18:43:48,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895497009] [2020-10-23 18:43:48,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:48,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:48,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020619979] [2020-10-23 18:43:48,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:48,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:48,331 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-23 18:43:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:48,419 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-23 18:43:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:43:48,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-23 18:43:48,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:48,420 INFO L225 Difference]: With dead ends: 20 [2020-10-23 18:43:48,420 INFO L226 Difference]: Without dead ends: 14 [2020-10-23 18:43:48,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-23 18:43:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-23 18:43:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-23 18:43:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-23 18:43:48,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-23 18:43:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:48,446 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-23 18:43:48,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-23 18:43:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:48,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:48,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:48,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:48,449 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:48,450 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-23 18:43:48,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:48,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069282798] [2020-10-23 18:43:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:48,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:48,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069282798] [2020-10-23 18:43:48,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659444326] [2020-10-23 18:43:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:43:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:48,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:48,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2020-10-23 18:43:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996977811] [2020-10-23 18:43:48,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:43:48,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:43:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:48,759 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-23 18:43:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:48,888 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-23 18:43:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:48,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-23 18:43:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:48,890 INFO L225 Difference]: With dead ends: 21 [2020-10-23 18:43:48,890 INFO L226 Difference]: Without dead ends: 15 [2020-10-23 18:43:48,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-23 18:43:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-23 18:43:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-23 18:43:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-23 18:43:48,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-23 18:43:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:48,898 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-23 18:43:48,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:43:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-23 18:43:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:43:48,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:48,899 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:49,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:43:49,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-23 18:43:49,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:49,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005651258] [2020-10-23 18:43:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:49,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:49,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005651258] [2020-10-23 18:43:49,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764020999] [2020-10-23 18:43:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:49,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:43:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:49,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:49,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2020-10-23 18:43:49,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131917180] [2020-10-23 18:43:49,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:49,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:49,421 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-10-23 18:43:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:49,728 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-23 18:43:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:49,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-23 18:43:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:49,729 INFO L225 Difference]: With dead ends: 22 [2020-10-23 18:43:49,730 INFO L226 Difference]: Without dead ends: 16 [2020-10-23 18:43:49,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:43:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-23 18:43:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-23 18:43:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:43:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-23 18:43:49,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-23 18:43:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:49,737 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-23 18:43:49,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-23 18:43:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:43:49,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:49,738 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:49,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:49,952 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-23 18:43:49,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:49,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161921142] [2020-10-23 18:43:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:50,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161921142] [2020-10-23 18:43:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695426411] [2020-10-23 18:43:50,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:50,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:43:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:43:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:50,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:50,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2020-10-23 18:43:50,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663482861] [2020-10-23 18:43:50,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:43:50,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:43:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:50,265 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-10-23 18:43:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:50,562 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-23 18:43:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:50,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-23 18:43:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:50,566 INFO L225 Difference]: With dead ends: 23 [2020-10-23 18:43:50,566 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:43:50,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:43:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:43:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:43:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:43:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-23 18:43:50,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-23 18:43:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:50,577 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-23 18:43:50,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:43:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-23 18:43:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:50,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:50,578 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:50,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:50,779 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-23 18:43:50,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:50,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814965780] [2020-10-23 18:43:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:50,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:50,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814965780] [2020-10-23 18:43:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168019875] [2020-10-23 18:43:50,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:51,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:43:51,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 18:43:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:51,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:51,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2020-10-23 18:43:51,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263929705] [2020-10-23 18:43:51,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:43:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:43:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:43:51,107 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-10-23 18:43:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:51,479 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-23 18:43:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:43:51,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-10-23 18:43:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:51,481 INFO L225 Difference]: With dead ends: 24 [2020-10-23 18:43:51,482 INFO L226 Difference]: Without dead ends: 18 [2020-10-23 18:43:51,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:43:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-23 18:43:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-23 18:43:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-23 18:43:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-23 18:43:51,494 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-23 18:43:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:51,494 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-23 18:43:51,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:43:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-23 18:43:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:43:51,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:51,495 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:51,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:51,697 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-23 18:43:51,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:51,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894108811] [2020-10-23 18:43:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:51,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:51,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894108811] [2020-10-23 18:43:51,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685773211] [2020-10-23 18:43:51,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:52,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-23 18:43:52,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 18:43:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:52,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:52,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2020-10-23 18:43:52,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061839688] [2020-10-23 18:43:52,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:43:52,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:43:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:43:52,118 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2020-10-23 18:43:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:52,515 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-23 18:43:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:43:52,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-10-23 18:43:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:52,516 INFO L225 Difference]: With dead ends: 25 [2020-10-23 18:43:52,517 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:43:52,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:43:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:43:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-23 18:43:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-23 18:43:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-23 18:43:52,529 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-23 18:43:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:52,529 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-23 18:43:52,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:43:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-23 18:43:52,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:43:52,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:52,530 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:52,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:43:52,731 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-23 18:43:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:52,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521720758] [2020-10-23 18:43:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:52,766 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:52,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:52,820 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:52,820 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:52,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:43:52,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:52 BoogieIcfgContainer [2020-10-23 18:43:52,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:52,854 INFO L168 Benchmark]: Toolchain (without parser) took 6375.69 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 132.4 MB in the beginning and 101.4 MB in the end (delta: 31.0 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,855 INFO L168 Benchmark]: CDTParser took 1.30 ms. Allocated memory is still 125.8 MB. Free memory was 95.1 MB in the beginning and 94.9 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:52,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.27 ms. Allocated memory is still 156.2 MB. Free memory was 131.8 MB in the beginning and 122.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,857 INFO L168 Benchmark]: Boogie Preprocessor took 38.06 ms. Allocated memory is still 156.2 MB. Free memory was 122.7 MB in the beginning and 121.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,858 INFO L168 Benchmark]: RCFGBuilder took 579.67 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 109.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,859 INFO L168 Benchmark]: TraceAbstraction took 5497.51 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 108.9 MB in the beginning and 101.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 39.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.30 ms. Allocated memory is still 125.8 MB. Free memory was 95.1 MB in the beginning and 94.9 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.27 ms. Allocated memory is still 156.2 MB. Free memory was 131.8 MB in the beginning and 122.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.06 ms. Allocated memory is still 156.2 MB. Free memory was 122.7 MB in the beginning and 121.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 579.67 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 109.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5497.51 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 108.9 MB in the beginning and 101.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 39.9 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: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) VAL [x=6, y=64] [L21] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 45 SDslu, 195 SDs, 0 SdLazy, 341 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 8642 SizeOfPredicates, 5 NumberOfNonLiveVariables, 525 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/70 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...