/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/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:22:38,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:22:38,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:22:38,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:22:38,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:22:38,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:22:38,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:22:38,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:22:38,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:22:38,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:22:38,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:22:38,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:22:38,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:22:38,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:22:38,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:22:38,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:22:38,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:22:38,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:22:38,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:22:38,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:22:38,940 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 08:22:38,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:22:38,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:22:38,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:22:38,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:22:38,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:22:38,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:22:38,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:22:38,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:22:38,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:22:38,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:22:38,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:22:38,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:22:38,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:22:38,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:22:38,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:22:38,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:22:38,970 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:22:38,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:22:39,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:22:39,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:22:39,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:22:39,369 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:22:39,369 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:22:39,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-01 08:22:39,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d33732c/fe2aafa2820c477eaa7d058d1ddcd586/FLAG243753fac [2021-05-01 08:22:39,920 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:22:39,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-01 08:22:39,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d33732c/fe2aafa2820c477eaa7d058d1ddcd586/FLAG243753fac [2021-05-01 08:22:40,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d33732c/fe2aafa2820c477eaa7d058d1ddcd586 [2021-05-01 08:22:40,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:22:40,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:22:40,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:40,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:22:40,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:22:40,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712cea01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40, skipping insertion in model container [2021-05-01 08:22:40,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:22:40,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:22:40,546 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] [2021-05-01 08:22:40,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:22:40,599 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:22:40,676 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] [2021-05-01 08:22:40,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:22:40,697 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:22:40,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40 WrapperNode [2021-05-01 08:22:40,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:40,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:22:40,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:22:40,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:22:40,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (1/1) ... [2021-05-01 08:22:40,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:22:40,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:22:40,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:22:40,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:22:40,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (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 08:22:40,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:22:40,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:22:40,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:22:40,858 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:22:40,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:22:40,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:22:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:22:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:22:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:22:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:22:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:22:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:22:41,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:22:41,228 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-01 08:22:41,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:41 BoogieIcfgContainer [2021-05-01 08:22:41,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:22:41,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:22:41,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:22:41,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:22:41,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:22:40" (1/3) ... [2021-05-01 08:22:41,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b53663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:41, skipping insertion in model container [2021-05-01 08:22:41,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:40" (2/3) ... [2021-05-01 08:22:41,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b53663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:41, skipping insertion in model container [2021-05-01 08:22:41,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:41" (3/3) ... [2021-05-01 08:22:41,238 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2021-05-01 08:22:41,243 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:22:41,248 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:22:41,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:22:41,283 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:22:41,284 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:22:41,284 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:22:41,284 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:22:41,284 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:22:41,284 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:22:41,284 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:22:41,284 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:22:41,299 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) [2021-05-01 08:22:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 08:22:41,307 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:22:41,308 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 08:22:41,309 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:22:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:22:41,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-01 08:22:41,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:22:41,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701783657] [2021-05-01 08:22:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:22:41,403 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:22:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:41,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:22:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:41,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:22:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:41,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:22:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:41,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:22:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:41,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:22:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:41,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:41,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:41,718 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 08:22:41,721 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:22:41,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701783657] [2021-05-01 08:22:41,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701783657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:22:41,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:22:41,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:22:41,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957601842] [2021-05-01 08:22:41,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:22:41,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:22:41,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:22:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:22:41,752 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) [2021-05-01 08:22:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:22:41,964 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-01 08:22:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:22:41,967 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 08:22:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:22:41,976 INFO L225 Difference]: With dead ends: 73 [2021-05-01 08:22:41,976 INFO L226 Difference]: Without dead ends: 35 [2021-05-01 08:22:41,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:22:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-01 08:22:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-01 08:22:42,022 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) [2021-05-01 08:22:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-01 08:22:42,025 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-01 08:22:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:22:42,026 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-01 08:22:42,026 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 08:22:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-01 08:22:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-01 08:22:42,029 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:22:42,029 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, 1] [2021-05-01 08:22:42,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:22:42,029 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:22:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:22:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-01 08:22:42,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:22:42,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352013084] [2021-05-01 08:22:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:22:42,034 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:22:42,067 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:22:42,067 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:22:42,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:22:42,089 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:22:42,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:22:42 BoogieIcfgContainer [2021-05-01 08:22:42,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:22:42,092 INFO L168 Benchmark]: Toolchain (without parser) took 1746.80 ms. Allocated memory is still 179.3 MB. Free memory was 144.3 MB in the beginning and 149.7 MB in the end (delta: -5.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:42,093 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 179.3 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:42,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.53 ms. Allocated memory is still 179.3 MB. Free memory was 144.1 MB in the beginning and 162.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:42,094 INFO L168 Benchmark]: Boogie Preprocessor took 49.30 ms. Allocated memory is still 179.3 MB. Free memory was 162.3 MB in the beginning and 160.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:42,095 INFO L168 Benchmark]: RCFGBuilder took 480.22 ms. Allocated memory is still 179.3 MB. Free memory was 160.7 MB in the beginning and 143.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:42,096 INFO L168 Benchmark]: TraceAbstraction took 858.92 ms. Allocated memory is still 179.3 MB. Free memory was 143.4 MB in the beginning and 149.7 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:42,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 179.3 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 347.53 ms. Allocated memory is still 179.3 MB. Free memory was 144.1 MB in the beginning and 162.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.30 ms. Allocated memory is still 179.3 MB. Free memory was 162.3 MB in the beginning and 160.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 480.22 ms. Allocated memory is still 179.3 MB. Free memory was 160.7 MB in the beginning and 143.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 858.92 ms. Allocated memory is still 179.3 MB. Free memory was 143.4 MB in the beginning and 149.7 MB in the end (delta: -6.3 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] 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: 792.5ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 14.6ms, AutomataDifference: 246.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 24 SDslu, 3 SDs, 0 SdLazy, 12 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms 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: 31.5ms 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...