/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/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:42:45,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:42:45,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:42:45,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:42:45,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:42:45,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:42:45,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:42:45,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:42:45,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:42:45,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:42:45,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:42:45,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:42:45,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:42:45,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:42:45,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:42:45,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:42:45,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:42:45,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:42:45,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:42:45,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:42:45,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:42:45,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:42:45,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:42:45,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:42:45,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:42:45,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:42:45,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:42:45,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:42:45,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:42:45,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:42:45,192 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:42:45,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:42:45,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:42:45,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:42:45,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:42:45,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:42:45,586 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:42:45,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-03 00:42:45,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273e9aba3/38987585b6f442a48132c9bd2beefe16/FLAG7dfa1c64f [2021-05-03 00:42:46,115 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:42:46,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-03 00:42:46,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273e9aba3/38987585b6f442a48132c9bd2beefe16/FLAG7dfa1c64f [2021-05-03 00:42:46,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273e9aba3/38987585b6f442a48132c9bd2beefe16 [2021-05-03 00:42:46,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:42:46,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:42:46,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:46,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:42:46,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:42:46,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10db317d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46, skipping insertion in model container [2021-05-03 00:42:46,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:42:46,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:42:46,772 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_unwindbound100.c[489,502] [2021-05-03 00:42:46,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:46,804 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:42:46,816 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_unwindbound100.c[489,502] [2021-05-03 00:42:46,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:46,838 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:42:46,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46 WrapperNode [2021-05-03 00:42:46,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:46,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:42:46,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:42:46,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:42:46,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (1/1) ... [2021-05-03 00:42:46,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:42:46,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:42:46,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:42:46,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:42:46,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (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 [2021-05-03 00:42:47,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:42:47,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:42:47,008 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:42:47,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:42:47,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:42:47,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:42:47,009 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:42:47,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:42:47,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:42:47,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:42:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:42:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:42:47,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:42:47,356 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:42:47,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:47 BoogieIcfgContainer [2021-05-03 00:42:47,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:42:47,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:42:47,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:42:47,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:42:47,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:42:46" (1/3) ... [2021-05-03 00:42:47,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e18858c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:47, skipping insertion in model container [2021-05-03 00:42:47,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:46" (2/3) ... [2021-05-03 00:42:47,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e18858c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:47, skipping insertion in model container [2021-05-03 00:42:47,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:47" (3/3) ... [2021-05-03 00:42:47,383 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2021-05-03 00:42:47,389 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:42:47,409 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:42:47,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:42:47,473 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:42:47,473 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:42:47,473 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:42:47,473 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:42:47,473 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:42:47,474 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:42:47,474 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:42:47,474 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:42:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-05-03 00:42:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:42:47,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:47,515 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:47,516 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-03 00:42:47,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:47,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740478204] [2021-05-03 00:42:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:47,589 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:47,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:47,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:42:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:47,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:42:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:42:47,861 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:47,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740478204] [2021-05-03 00:42:47,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740478204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:47,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:47,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:42:47,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126592649] [2021-05-03 00:42:47,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:42:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:47,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:42:47,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:47,890 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:42:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:48,144 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-03 00:42:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:42:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-03 00:42:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:48,159 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:42:48,160 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 00:42:48,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 00:42:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-03 00:42:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-05-03 00:42:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-03 00:42:48,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-03 00:42:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:48,270 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-03 00:42:48,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:42:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-03 00:42:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:42:48,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:48,272 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:48,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:42:48,281 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-03 00:42:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:48,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374034911] [2021-05-03 00:42:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:48,294 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:48,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:48,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:42:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:42:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:42:48,465 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374034911] [2021-05-03 00:42:48,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374034911] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:48,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:48,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 00:42:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538574935] [2021-05-03 00:42:48,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 00:42:48,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 00:42:48,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:42:48,469 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:42:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:48,636 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-03 00:42:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:42:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-03 00:42:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:48,651 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:42:48,651 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:42:48,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:42:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:42:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 00:42:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-05-03 00:42:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-03 00:42:48,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-03 00:42:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:48,668 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-03 00:42:48,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:42:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-03 00:42:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:42:48,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:48,672 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:48,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:42:48,676 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-03 00:42:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:48,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432184066] [2021-05-03 00:42:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:48,683 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:48,705 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:42:48,706 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:42:48,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:42:48,723 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:42:48,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:42:48 BoogieIcfgContainer [2021-05-03 00:42:48,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:42:48,725 INFO L168 Benchmark]: Toolchain (without parser) took 2183.85 ms. Allocated memory is still 187.7 MB. Free memory was 153.8 MB in the beginning and 127.8 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:48,726 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 187.7 MB. Free memory was 170.3 MB in the beginning and 170.2 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:48,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.91 ms. Allocated memory is still 187.7 MB. Free memory was 153.6 MB in the beginning and 143.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:48,727 INFO L168 Benchmark]: Boogie Preprocessor took 70.01 ms. Allocated memory is still 187.7 MB. Free memory was 143.7 MB in the beginning and 171.4 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:48,727 INFO L168 Benchmark]: RCFGBuilder took 446.90 ms. Allocated memory is still 187.7 MB. Free memory was 171.4 MB in the beginning and 155.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:48,728 INFO L168 Benchmark]: TraceAbstraction took 1363.84 ms. Allocated memory is still 187.7 MB. Free memory was 155.2 MB in the beginning and 127.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:48,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 187.7 MB. Free memory was 170.3 MB in the beginning and 170.2 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.91 ms. Allocated memory is still 187.7 MB. Free memory was 153.6 MB in the beginning and 143.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.01 ms. Allocated memory is still 187.7 MB. Free memory was 143.7 MB in the beginning and 171.4 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 446.90 ms. Allocated memory is still 187.7 MB. Free memory was 171.4 MB in the beginning and 155.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1363.84 ms. Allocated memory is still 187.7 MB. Free memory was 155.2 MB in the beginning and 127.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 28.4 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: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<100 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1239.7ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 17.2ms, AutomataDifference: 484.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 74 SDtfs, 23 SDslu, 41 SDs, 0 SdLazy, 70 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 223.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...