/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/nla-digbench-scaling/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:22:15,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:22:15,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:22:15,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 08:22:15,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 08:22:15,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 08:22:15,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 08:22:15,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 08:22:15,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 08:22:15,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 08:22:15,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 08:22:15,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 08:22:15,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:22:15,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:22:15,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:22:15,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:22:15,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:22:15,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:22:15,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:22:15,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:22:15,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:22:15,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:22:15,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:22:15,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:22:15,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-01 08:22:15,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-01 08:22:15,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-01 08:22:15,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-01 08:22:15,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-01 08:22:15,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-01 08:22:15,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:22:15,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:22:15,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:22:15,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:22:15,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:22:15,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:22:15,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:22:15,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:22:15,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:22:15,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:22:15,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:22:15,943 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 08:22:15,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:22:15,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:22:15,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:22:15,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:22:15,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:22:15,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:22:15,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:22:15,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:22:15,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:22:15,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:22:15,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:22:15,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:22:15,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:22:15,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:22:15,965 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:22:15,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:22:16,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:22:16,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:22:16,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:22:16,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:22:16,346 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:22:16,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-01 08:22:16,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d296b6f/276cf0a84a8f441394409b80cf41e2cc/FLAG1455a9744 [2021-05-01 08:22:16,960 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:22:16,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-01 08:22:16,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d296b6f/276cf0a84a8f441394409b80cf41e2cc/FLAG1455a9744 [2021-05-01 08:22:17,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d296b6f/276cf0a84a8f441394409b80cf41e2cc [2021-05-01 08:22:17,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:22:17,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:22:17,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:17,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:22:17,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:22:17,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568d1599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17, skipping insertion in model container [2021-05-01 08:22:17,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:22:17,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:22:17,545 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c[489,502] [2021-05-01 08:22:17,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:22:17,587 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:22:17,599 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c[489,502] [2021-05-01 08:22:17,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:22:17,679 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:22:17,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17 WrapperNode [2021-05-01 08:22:17,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:17,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:22:17,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:22:17,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:22:17,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (1/1) ... [2021-05-01 08:22:17,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:22:17,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:22:17,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:22:17,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:22:17,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (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 08:22:17,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:22:17,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:22:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:22:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:22:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:22:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:22:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:22:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:22:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:22:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:22:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:22:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:22:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:22:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:22:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:22:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:22:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:22:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:22:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:22:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:22:18,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:22:18,141 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:22:18,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:18 BoogieIcfgContainer [2021-05-01 08:22:18,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:22:18,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:22:18,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:22:18,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:22:18,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:22:17" (1/3) ... [2021-05-01 08:22:18,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14851553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:18, skipping insertion in model container [2021-05-01 08:22:18,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:17" (2/3) ... [2021-05-01 08:22:18,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14851553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:18, skipping insertion in model container [2021-05-01 08:22:18,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:18" (3/3) ... [2021-05-01 08:22:18,151 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2021-05-01 08:22:18,168 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:22:18,172 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:22:18,205 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:22:18,238 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:22:18,238 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:22:18,238 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:22:18,238 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:22:18,239 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:22:18,239 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:22:18,239 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:22:18,239 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:22:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-01 08:22:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 08:22:18,271 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:22:18,272 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:22:18,273 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:22:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:22:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-01 08:22:18,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:22:18,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172239297] [2021-05-01 08:22:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:22:18,354 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:22:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:18,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,494 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:22:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:18,599 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:22:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:18,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:22:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:18,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:22:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:18,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:22:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:18,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:18,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-01 08:22:18,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:22:18,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172239297] [2021-05-01 08:22:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [172239297] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:22:18,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:22:18,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:22:18,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267046796] [2021-05-01 08:22:18,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:22:18,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:22:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:22:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:22:18,647 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-01 08:22:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:22:18,896 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-01 08:22:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:22:18,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-01 08:22:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:22:18,905 INFO L225 Difference]: With dead ends: 67 [2021-05-01 08:22:18,905 INFO L226 Difference]: Without dead ends: 32 [2021-05-01 08:22:18,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:22:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-01 08:22:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-01 08:22:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 08:22:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-01 08:22:18,950 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-01 08:22:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:22:18,950 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-01 08:22:18,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-01 08:22:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-01 08:22:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 08:22:18,952 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:22:18,952 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:22:18,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:22:18,953 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:22:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:22:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-01 08:22:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:22:18,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832874437] [2021-05-01 08:22:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:22:18,957 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:22:18,976 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:22:18,981 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:22:18,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:22:19,003 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:22:19,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:22:19 BoogieIcfgContainer [2021-05-01 08:22:19,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:22:19,004 INFO L168 Benchmark]: Toolchain (without parser) took 1615.21 ms. Allocated memory is still 177.2 MB. Free memory was 142.2 MB in the beginning and 149.9 MB in the end (delta: -7.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:19,006 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 177.2 MB. Free memory is still 159.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:19,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.39 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 160.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:19,008 INFO L168 Benchmark]: Boogie Preprocessor took 39.12 ms. Allocated memory is still 177.2 MB. Free memory was 160.9 MB in the beginning and 159.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:19,009 INFO L168 Benchmark]: RCFGBuilder took 421.72 ms. Allocated memory is still 177.2 MB. Free memory was 159.4 MB in the beginning and 143.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:19,010 INFO L168 Benchmark]: TraceAbstraction took 858.97 ms. Allocated memory is still 177.2 MB. Free memory was 143.3 MB in the beginning and 149.9 MB in the end (delta: -6.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:19,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 177.2 MB. Free memory is still 159.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.39 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 160.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.12 ms. Allocated memory is still 177.2 MB. Free memory was 160.9 MB in the beginning and 159.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 421.72 ms. Allocated memory is still 177.2 MB. Free memory was 159.4 MB in the beginning and 143.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 858.97 ms. Allocated memory is still 177.2 MB. Free memory was 143.3 MB in the beginning and 149.9 MB in the end (delta: -6.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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: [L19] long long a, b, p, q, r, s; [L20] int x, y; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=2) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=2) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=2) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=2) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 752.4ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 17.7ms, AutomataDifference: 273.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 14 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 150.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...