/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:29:13,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:29:13,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:29:13,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:29:13,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:29:13,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:29:13,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:29:13,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:29:13,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:29:13,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:29:13,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:29:13,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:29:13,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:29:13,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:29:13,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:29:13,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:29:13,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:29:13,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:29:13,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:29:13,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:29:13,917 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:29:13,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:29:13,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:29:13,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:29:13,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:29:13,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:29:13,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:29:13,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:29:13,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:29:13,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:29:13,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:29:13,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:29:13,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:29:13,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:29:13,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:29:13,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:29:13,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:29:13,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:29:13,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:29:13,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:29:13,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:29:13,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:29:13,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:29:13,934 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:29:13,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:29:14,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:29:14,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:29:14,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:29:14,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:29:14,244 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:29:14,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-06 12:29:14,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b3640a9c/567906759bd046acae3108a746c40411/FLAG211ac85d1 [2021-05-06 12:29:14,727 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:29:14,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-06 12:29:14,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b3640a9c/567906759bd046acae3108a746c40411/FLAG211ac85d1 [2021-05-06 12:29:14,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b3640a9c/567906759bd046acae3108a746c40411 [2021-05-06 12:29:14,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:29:14,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:29:14,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:29:14,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:29:14,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:29:14,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:14,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1178a0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14, skipping insertion in model container [2021-05-06 12:29:14,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:14,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:29:14,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:29:14,879 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/egcd3-ll_valuebound20.c[490,503] [2021-05-06 12:29:14,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:29:14,952 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:29:14,962 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/egcd3-ll_valuebound20.c[490,503] [2021-05-06 12:29:14,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:29:14,981 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:29:14,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14 WrapperNode [2021-05-06 12:29:14,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:29:14,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:29:14,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:29:14,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:29:14,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:14,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:14,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:14,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:15,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:15,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:15,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (1/1) ... [2021-05-06 12:29:15,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:29:15,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:29:15,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:29:15,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:29:15,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (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 [2021-05-06 12:29:15,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:29:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:29:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:29:15,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:29:15,409 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 12:29:15,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:29:15 BoogieIcfgContainer [2021-05-06 12:29:15,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:29:15,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:29:15,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:29:15,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:29:15,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:29:14" (1/3) ... [2021-05-06 12:29:15,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b18e66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:29:15, skipping insertion in model container [2021-05-06 12:29:15,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:14" (2/3) ... [2021-05-06 12:29:15,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b18e66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:29:15, skipping insertion in model container [2021-05-06 12:29:15,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:29:15" (3/3) ... [2021-05-06 12:29:15,417 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2021-05-06 12:29:15,421 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:29:15,424 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:29:15,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:29:15,457 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:29:15,457 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:29:15,457 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:29:15,457 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:29:15,457 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:29:15,457 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:29:15,458 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:29:15,458 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:29:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 12:29:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:29:15,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:29:15,477 INFO L523 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] [2021-05-06 12:29:15,477 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:29:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:29:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-06 12:29:15,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:29:15,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879028741] [2021-05-06 12:29:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:29:15,539 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:29:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:29:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:15,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:29:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:15,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 12:29:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:15,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 12:29:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:15,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 12:29:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 12:29:15,767 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:29:15,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879028741] [2021-05-06 12:29:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [879028741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:29:15,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:29:15,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:29:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676074106] [2021-05-06 12:29:15,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:29:15,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:29:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:29:15,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:29:15,790 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2021-05-06 12:29:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:29:15,972 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-06 12:29:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:29:15,974 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 [2021-05-06 12:29:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:29:15,981 INFO L225 Difference]: With dead ends: 73 [2021-05-06 12:29:15,981 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 12:29:15,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:29:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 12:29:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 12:29:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 12:29:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 12:29:16,041 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 12:29:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:29:16,041 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 12:29:16,042 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) [2021-05-06 12:29:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 12:29:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 12:29:16,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:29:16,044 INFO L523 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, 1] [2021-05-06 12:29:16,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:29:16,044 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:29:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:29:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-06 12:29:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:29:16,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676136398] [2021-05-06 12:29:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:29:16,049 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:29:16,067 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:29:16,067 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:29:16,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:29:16,082 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:29:16,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:29:16 BoogieIcfgContainer [2021-05-06 12:29:16,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:29:16,083 INFO L168 Benchmark]: Toolchain (without parser) took 1335.23 ms. Allocated memory is still 204.5 MB. Free memory was 168.6 MB in the beginning and 123.7 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:16,084 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 204.5 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:29:16,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.19 ms. Allocated memory is still 204.5 MB. Free memory was 168.4 MB in the beginning and 186.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:16,085 INFO L168 Benchmark]: Boogie Preprocessor took 25.90 ms. Allocated memory is still 204.5 MB. Free memory was 186.1 MB in the beginning and 184.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:16,086 INFO L168 Benchmark]: RCFGBuilder took 400.71 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 167.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:16,086 INFO L168 Benchmark]: TraceAbstraction took 670.76 ms. Allocated memory is still 204.5 MB. Free memory was 166.7 MB in the beginning and 123.7 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:16,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 204.5 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.19 ms. Allocated memory is still 204.5 MB. Free memory was 168.4 MB in the beginning and 186.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.90 ms. Allocated memory is still 204.5 MB. Free memory was 186.1 MB in the beginning and 184.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 400.71 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 167.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 670.76 ms. Allocated memory is still 204.5 MB. Free memory was 166.7 MB in the beginning and 123.7 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. 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] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=20) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=20) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=20) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=20) [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] COND TRUE !(b != 0) [L74] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 616.5ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 11.1ms, AutomataDifference: 211.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 24 SDslu, 3 SDs, 0 SdLazy, 12 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 42.9ms 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...