/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:03:52,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:03:52,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:03:52,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:03:52,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:03:52,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:03:52,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:03:52,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:03:52,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:03:52,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:03:52,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:03:52,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:03:52,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:03:52,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:03:52,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:03:52,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:03:52,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:03:52,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:03:52,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:03:52,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:03:52,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:03:53,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:03:53,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:03:53,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:03:53,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:03:53,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:03:53,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:03:53,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:03:53,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:03:53,021 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:03:53,021 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:03:53,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:03:53,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:03:53,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:03:53,433 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:03:53,434 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:03:53,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2021-05-01 08:03:53,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23bc42ab4/62cfc122975042578153b92fcf42940d/FLAGde39307e8 [2021-05-01 08:03:54,153 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:03:54,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2021-05-01 08:03:54,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23bc42ab4/62cfc122975042578153b92fcf42940d/FLAGde39307e8 [2021-05-01 08:03:54,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23bc42ab4/62cfc122975042578153b92fcf42940d [2021-05-01 08:03:54,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:03:54,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:03:54,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:03:54,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:03:54,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:03:54,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f03dce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54, skipping insertion in model container [2021-05-01 08:03:54,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:03:54,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:03:54,678 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2021-05-01 08:03:54,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:03:54,713 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:03:54,726 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2021-05-01 08:03:54,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:03:54,752 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:03:54,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54 WrapperNode [2021-05-01 08:03:54,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:03:54,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:03:54,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:03:54,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:03:54,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (1/1) ... [2021-05-01 08:03:54,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:03:54,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:03:54,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:03:54,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:03:54,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (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 [2021-05-01 08:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:03:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:03:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2021-05-01 08:03:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2021-05-01 08:03:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2021-05-01 08:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2021-05-01 08:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:03:54,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:03:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:03:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:03:55,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:03:55,288 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-01 08:03:55,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:03:55 BoogieIcfgContainer [2021-05-01 08:03:55,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:03:55,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:03:55,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:03:55,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:03:55,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:03:54" (1/3) ... [2021-05-01 08:03:55,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5085aa3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:03:55, skipping insertion in model container [2021-05-01 08:03:55,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:03:54" (2/3) ... [2021-05-01 08:03:55,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5085aa3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:03:55, skipping insertion in model container [2021-05-01 08:03:55,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:03:55" (3/3) ... [2021-05-01 08:03:55,297 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2021-05-01 08:03:55,302 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:03:55,307 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:03:55,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:03:55,342 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:03:55,343 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:03:55,343 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:03:55,343 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:03:55,343 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:03:55,343 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:03:55,343 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:03:55,343 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:03:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 08:03:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 08:03:55,365 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:03:55,365 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:03:55,366 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:03:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:03:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2021-05-01 08:03:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:03:55,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197675718] [2021-05-01 08:03:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:03:55,441 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:03:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:03:55,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:55,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:55,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:55,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:03:55,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:55,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:03:55,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:55,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:03:55,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:55,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:55,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:03:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:03:55,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:55,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:03:55,753 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:03:55,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197675718] [2021-05-01 08:03:55,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197675718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:03:55,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:03:55,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 08:03:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855685463] [2021-05-01 08:03:55,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 08:03:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:03:55,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 08:03:55,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 08:03:55,782 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) 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) [2021-05-01 08:03:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:03:56,208 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2021-05-01 08:03:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 08:03:56,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) 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 [2021-05-01 08:03:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:03:56,217 INFO L225 Difference]: With dead ends: 76 [2021-05-01 08:03:56,217 INFO L226 Difference]: Without dead ends: 32 [2021-05-01 08:03:56,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 08:03:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-01 08:03:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-01 08:03:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 08:03:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-01 08:03:56,280 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2021-05-01 08:03:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:03:56,281 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-01 08:03:56,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) 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) [2021-05-01 08:03:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-01 08:03:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-01 08:03:56,283 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:03:56,284 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:03:56,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:03:56,284 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:03:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:03:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2021-05-01 08:03:56,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:03:56,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399040418] [2021-05-01 08:03:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:03:56,295 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:03:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:03:56,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:56,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:03:56,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:03:56,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:03:56,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:03:56,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:03:56,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:03:56,431 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:56,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:03:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:03:56,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:56,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-01 08:03:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:03:56,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:56,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:03:56,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:03:56,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:03:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:03:56,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:03:56,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:56,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:03:56,627 INFO L142 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-05-01 08:03:56,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 08:03:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:03:56,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:03:56,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399040418] [2021-05-01 08:03:56,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [399040418] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:03:56,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:03:56,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-01 08:03:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223373432] [2021-05-01 08:03:56,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-01 08:03:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:03:56,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-01 08:03:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-01 08:03:56,646 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:03:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:03:57,200 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-05-01 08:03:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-01 08:03:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-01 08:03:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:03:57,211 INFO L225 Difference]: With dead ends: 50 [2021-05-01 08:03:57,211 INFO L226 Difference]: Without dead ends: 44 [2021-05-01 08:03:57,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-01 08:03:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-01 08:03:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-05-01 08:03:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-01 08:03:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-01 08:03:57,225 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2021-05-01 08:03:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:03:57,225 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-01 08:03:57,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:03:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-01 08:03:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-01 08:03:57,227 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:03:57,227 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:03:57,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:03:57,228 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:03:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:03:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2021-05-01 08:03:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:03:57,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98992379] [2021-05-01 08:03:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:03:57,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:03:57,265 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_student_version_~x~1_6 v_student_version_~i~1_6) InVars {student_version_~i~1=v_student_version_~i~1_6, student_version_~x~1=v_student_version_~x~1_6} OutVars{student_version_~i~1=v_student_version_~i~1_6, student_version_~x~1=v_student_version_~x~1_6} AuxVars[] AssignedVars[] [2021-05-01 08:03:57,278 WARN L240 tifierPushTermWalker]: treesize reduction 10, result has 84.4 percent of original size [2021-05-01 08:03:57,281 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,302 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:03:57,305 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,306 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 08:03:57,309 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:03:57,314 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,317 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,320 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,323 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,328 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,331 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,334 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,337 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,342 WARN L245 tifierPushTermWalker]: treesize reduction 10, result has 84.4 percent of original size 54 [2021-05-01 08:03:57,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:03:57,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 08:03:57,359 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 08:03:57,371 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:03:57,372 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:03:57,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:03:57,387 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:03:57,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:03:57 BoogieIcfgContainer [2021-05-01 08:03:57,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:03:57,389 INFO L168 Benchmark]: Toolchain (without parser) took 2880.36 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.0 MB in the beginning and 192.7 MB in the end (delta: -31.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. [2021-05-01 08:03:57,389 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 195.0 MB. Free memory is still 177.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:03:57,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.90 ms. Allocated memory is still 195.0 MB. Free memory was 160.8 MB in the beginning and 150.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:03:57,390 INFO L168 Benchmark]: Boogie Preprocessor took 72.73 ms. Allocated memory is still 195.0 MB. Free memory was 150.4 MB in the beginning and 178.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-01 08:03:57,390 INFO L168 Benchmark]: RCFGBuilder took 461.39 ms. Allocated memory is still 195.0 MB. Free memory was 178.9 MB in the beginning and 159.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-01 08:03:57,391 INFO L168 Benchmark]: TraceAbstraction took 2097.03 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 159.5 MB in the beginning and 192.7 MB in the end (delta: -33.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:03:57,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 195.0 MB. Free memory is still 177.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.90 ms. Allocated memory is still 195.0 MB. Free memory was 160.8 MB in the beginning and 150.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.73 ms. Allocated memory is still 195.0 MB. Free memory was 150.4 MB in the beginning and 178.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 461.39 ms. Allocated memory is still 195.0 MB. Free memory was 178.9 MB in the beginning and 159.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2097.03 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 159.5 MB in the beginning and 192.7 MB in the end (delta: -33.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L91] int a=__VERIFIER_nondet_int(), n=__VERIFIER_nondet_int(), m=__VERIFIER_nondet_int(); [L91] int a=__VERIFIER_nondet_int(), n=__VERIFIER_nondet_int(), m=__VERIFIER_nondet_int(); [L91] int a=__VERIFIER_nondet_int(), n=__VERIFIER_nondet_int(), m=__VERIFIER_nondet_int(); [L93] int n_stones1, n_stones2=__VERIFIER_nondet_int(); [L93] int n_stones1, n_stones2=__VERIFIER_nondet_int(); [L95] n_stones1 = n_stones2 [L97-L102] COND TRUE (1 <= n) && (1 <= m) && (1 <= a) && (n <= 109) && (m <= 109) && (a <= 109) [L104] CALL, EXPR correct_version(n, m, a) [L36] int i = 0, j = 0, b = 0, l = 0; [L38] COND FALSE !(b < n) [L44] COND FALSE !(l < m) [L50] int x = 0, y = 0; [L52] COND FALSE !(x < i) [L58] return y; [L104] RET, EXPR correct_version(n, m, a) [L104] n_stones1 = correct_version(n, m, a) [L105] CALL, EXPR student_version(n, m, a) [L63] int i = 0, j = 0, b = 0, l = 0; [L65] COND FALSE !(b < n) [L71] COND FALSE !(l < m) [L77] int x = 0, y = 0; [L79] COND TRUE x < i [L81] y = y + j [L82] x = x + 1 [L79] COND FALSE !(x < i) [L85] return y; [L105] RET, EXPR student_version(n, m, a) [L105] n_stones2 = student_version(n, m, a) [L107] CALL __VERIFIER_assert(n_stones1 == n_stones2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2035.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 13.9ms, AutomataDifference: 1020.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 66 SDtfs, 88 SDslu, 100 SDs, 0 SdLazy, 431 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 327.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 588.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=2, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...