/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/multivar_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:59:35,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:59:35,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:59:35,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:59:35,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:59:35,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:59:35,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:59:35,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:59:35,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:59:35,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:59:35,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:59:35,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:59:35,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:59:35,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:59:35,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:59:35,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:59:35,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:59:35,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:59:35,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:59:35,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:59:35,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:59:35,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:59:35,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:59:35,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:59:35,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 17:59:35,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 17:59:35,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 17:59:35,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 17:59:35,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 17:59:35,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 17:59:35,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 17:59:35,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 17:59:35,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 17:59:35,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 17:59:35,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 17:59:35,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 17:59:35,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 17:59:35,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 17:59:35,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:59:35,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:59:35,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:59:35,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:59:35,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:59:35,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:59:35,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:59:35,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:59:35,805 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:59:35,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:59:35,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:59:35,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:59:35,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:59:35,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:59:35,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:59:35,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:59:35,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:59:35,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:59:35,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:59:35,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:59:35,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:59:35,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:59:35,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:59:35,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:59:35,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:59:35,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:59:35,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:59:35,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:59:35,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:59:35,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:59:35,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:59:35,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:59:35,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:59:36,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:59:36,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:59:36,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:59:36,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:59:36,209 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:59:36,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-1.c [2021-02-19 17:59:36,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/159e19c2e/72b04b73dc1143e5908f8305c502cef5/FLAGa8dc7882a [2021-02-19 17:59:36,973 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:59:36,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-1.c [2021-02-19 17:59:36,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/159e19c2e/72b04b73dc1143e5908f8305c502cef5/FLAGa8dc7882a [2021-02-19 17:59:37,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/159e19c2e/72b04b73dc1143e5908f8305c502cef5 [2021-02-19 17:59:37,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:59:37,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:59:37,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:59:37,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:59:37,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:59:37,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b44b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37, skipping insertion in model container [2021-02-19 17:59:37,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:59:37,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:59:37,663 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-1.c[374,387] [2021-02-19 17:59:37,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:59:37,689 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:59:37,704 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-1.c[374,387] [2021-02-19 17:59:37,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:59:37,722 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:59:37,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37 WrapperNode [2021-02-19 17:59:37,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:59:37,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:59:37,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:59:37,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:59:37,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (1/1) ... [2021-02-19 17:59:37,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:59:37,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:59:37,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:59:37,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:59:37,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (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 [2021-02-19 17:59:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:59:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:59:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:59:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 17:59:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 17:59:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:59:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:59:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:59:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:59:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:59:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:59:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:59:38,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:59:38,105 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 17:59:38,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:59:38 BoogieIcfgContainer [2021-02-19 17:59:38,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:59:38,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:59:38,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:59:38,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:59:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:59:37" (1/3) ... [2021-02-19 17:59:38,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777457e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:59:38, skipping insertion in model container [2021-02-19 17:59:38,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:59:37" (2/3) ... [2021-02-19 17:59:38,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777457e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:59:38, skipping insertion in model container [2021-02-19 17:59:38,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:59:38" (3/3) ... [2021-02-19 17:59:38,116 INFO L111 eAbstractionObserver]: Analyzing ICFG multivar_1-1.c [2021-02-19 17:59:38,122 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:59:38,127 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:59:38,146 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:59:38,202 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:59:38,202 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:59:38,202 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:59:38,202 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:59:38,202 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:59:38,203 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:59:38,203 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:59:38,203 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:59:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-02-19 17:59:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:59:38,252 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:59:38,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:59:38,253 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:59:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:59:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1301225826, now seen corresponding path program 1 times [2021-02-19 17:59:38,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:59:38,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496200631] [2021-02-19 17:59:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:59:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:59:38,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:59:38,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:59:38,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:59:38,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:59:38,730 WARN L141 QuantifierPusher]: treesize reduction 6, result has 92.1 percent of original size [2021-02-19 17:59:38,734 WARN L147 QuantifierPusher]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-02-19 17:59:38,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:59:38,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:59:38,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:59:38,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:59:38,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:59:38,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:59:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:59:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:59:38,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:59:38,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:59:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:59:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496200631] [2021-02-19 17:59:38,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:59:38,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 17:59:38,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065165348] [2021-02-19 17:59:38,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:59:38,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:59:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:59:38,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:59:38,890 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2021-02-19 17:59:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:59:39,113 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-02-19 17:59:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:59:39,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-02-19 17:59:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:59:39,122 INFO L225 Difference]: With dead ends: 27 [2021-02-19 17:59:39,122 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:59:39,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:59:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:59:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:59:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:59:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:59:39,156 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-02-19 17:59:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:59:39,156 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:59:39,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 17:59:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:59:39,157 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:59:39,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:59:39,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:59:39,337 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 17:59:39,338 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 17:59:39,338 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 17:59:39,338 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:59:39,339 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 17:59:39,339 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:59:39,339 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:59:39,339 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:59:39,339 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:59:39,339 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:59:39,340 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2021-02-19 17:59:39,340 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2021-02-19 17:59:39,340 INFO L185 CegarLoopUtils]: At program point L17-2(lines 17 20) the Hoare annotation is: (= main_~y~0 main_~x~0) [2021-02-19 17:59:39,340 INFO L185 CegarLoopUtils]: At program point L17-3(lines 17 20) the Hoare annotation is: (= main_~y~0 main_~x~0) [2021-02-19 17:59:39,340 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2021-02-19 17:59:39,341 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2021-02-19 17:59:39,341 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2021-02-19 17:59:39,341 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-02-19 17:59:39,341 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-02-19 17:59:39,341 INFO L189 CegarLoopUtils]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2021-02-19 17:59:39,342 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-02-19 17:59:39,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:59:39 BoogieIcfgContainer [2021-02-19 17:59:39,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:59:39,370 INFO L168 Benchmark]: Toolchain (without parser) took 1973.99 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 74.5 MB in the end (delta: 52.8 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:59:39,371 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:59:39,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.93 ms. Allocated memory is still 153.1 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:59:39,376 INFO L168 Benchmark]: Boogie Preprocessor took 31.48 ms. Allocated memory is still 153.1 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:59:39,377 INFO L168 Benchmark]: RCFGBuilder took 350.16 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 103.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:59:39,378 INFO L168 Benchmark]: TraceAbstraction took 1256.74 ms. Allocated memory is still 153.1 MB. Free memory was 102.8 MB in the beginning and 74.5 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:59:39,389 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 153.1 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 313.93 ms. Allocated memory is still 153.1 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.48 ms. Allocated memory is still 153.1 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 350.16 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 103.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1256.74 ms. Allocated memory is still 153.1 MB. Free memory was 102.8 MB in the beginning and 74.5 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: y == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 12 SDslu, 23 SDs, 0 SdLazy, 24 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 41 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 500 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...