/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_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:43:09,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:43:09,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:43:09,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:43:09,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:43:09,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:43:09,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:43:09,921 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 00:43:09,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:43:09,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:43:09,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:43:09,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:43:09,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:43:09,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:43:09,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:43:09,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:43:09,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:43:09,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:43:09,935 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:43:09,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:43:09,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:43:09,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:43:09,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:43:09,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:43:09,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:43:09,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:43:09,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:43:09,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:43:09,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:43:09,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:43:09,937 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:43:09,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:43:10,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:43:10,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:43:10,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:43:10,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:43:10,328 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:43:10,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-03 00:43:10,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22cdfa6c7/fa413908f10444619bc12213e2012c80/FLAG89c2a301e [2021-05-03 00:43:11,019 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:43:11,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-03 00:43:11,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22cdfa6c7/fa413908f10444619bc12213e2012c80/FLAG89c2a301e [2021-05-03 00:43:11,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22cdfa6c7/fa413908f10444619bc12213e2012c80 [2021-05-03 00:43:11,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:43:11,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:43:11,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:43:11,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:43:11,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:43:11,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5364ba1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11, skipping insertion in model container [2021-05-03 00:43:11,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:43:11,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:43:11,564 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_valuebound1.c[490,503] [2021-05-03 00:43:11,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:43:11,598 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:43:11,609 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_valuebound1.c[490,503] [2021-05-03 00:43:11,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:43:11,647 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:43:11,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11 WrapperNode [2021-05-03 00:43:11,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:43:11,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:43:11,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:43:11,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:43:11,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (1/1) ... [2021-05-03 00:43:11,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:43:11,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:43:11,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:43:11,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:43:11,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (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 00:43:11,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:43:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:43:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:43:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:43:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:43:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:43:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:43:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:43:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:43:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:43:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:43:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:43:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:43:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:43:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:43:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:43:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:43:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:43:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:43:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:43:12,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:43:12,040 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 00:43:12,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:43:12 BoogieIcfgContainer [2021-05-03 00:43:12,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:43:12,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:43:12,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:43:12,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:43:12,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:43:11" (1/3) ... [2021-05-03 00:43:12,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389f648b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:43:12, skipping insertion in model container [2021-05-03 00:43:12,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:11" (2/3) ... [2021-05-03 00:43:12,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389f648b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:43:12, skipping insertion in model container [2021-05-03 00:43:12,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:43:12" (3/3) ... [2021-05-03 00:43:12,049 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2021-05-03 00:43:12,055 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:43:12,059 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:43:12,078 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:43:12,099 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:43:12,099 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:43:12,099 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:43:12,099 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:43:12,099 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:43:12,099 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:43:12,099 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:43:12,100 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:43:12,133 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) [2021-05-03 00:43:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:43:12,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:12,157 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] [2021-05-03 00:43:12,158 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-03 00:43:12,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:12,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156549009] [2021-05-03 00:43:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:12,267 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:43:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:12,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:43:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:12,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:43:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:12,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:43:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-03 00:43:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-03 00:43:12,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156549009] [2021-05-03 00:43:12,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [156549009] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:12,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:12,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:43:12,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685995455] [2021-05-03 00:43:12,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:43:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:43:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:43:12,656 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) [2021-05-03 00:43:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:12,874 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-03 00:43:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:43:12,877 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 [2021-05-03 00:43:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:12,886 INFO L225 Difference]: With dead ends: 73 [2021-05-03 00:43:12,886 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:43:12,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:43:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:43:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-03 00:43:12,947 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) [2021-05-03 00:43:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-03 00:43:12,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-03 00:43:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:12,952 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-03 00:43:12,952 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) [2021-05-03 00:43:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-03 00:43:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:43:12,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:12,954 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] [2021-05-03 00:43:12,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:43:12,955 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-03 00:43:12,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:12,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037425807] [2021-05-03 00:43:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:12,959 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:43:13,003 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:43:13,004 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:43:13,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:43:13,028 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:43:13,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:43:13 BoogieIcfgContainer [2021-05-03 00:43:13,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:43:13,031 INFO L168 Benchmark]: Toolchain (without parser) took 1653.02 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 145.7 MB in the beginning and 192.0 MB in the end (delta: -46.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:13,031 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 180.4 MB. Free memory was 161.9 MB in the beginning and 161.9 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:13,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.88 ms. Allocated memory is still 180.4 MB. Free memory was 145.6 MB in the beginning and 164.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:13,033 INFO L168 Benchmark]: Boogie Preprocessor took 53.96 ms. Allocated memory is still 180.4 MB. Free memory was 164.1 MB in the beginning and 162.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:13,033 INFO L168 Benchmark]: RCFGBuilder took 338.14 ms. Allocated memory is still 180.4 MB. Free memory was 162.4 MB in the beginning and 145.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:13,034 INFO L168 Benchmark]: TraceAbstraction took 986.20 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 144.8 MB in the beginning and 192.0 MB in the end (delta: -47.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:13,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 180.4 MB. Free memory was 161.9 MB in the beginning and 161.9 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.88 ms. Allocated memory is still 180.4 MB. Free memory was 145.6 MB in the beginning and 164.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.96 ms. Allocated memory is still 180.4 MB. Free memory was 164.1 MB in the beginning and 162.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 338.14 ms. Allocated memory is still 180.4 MB. Free memory was 162.4 MB in the beginning and 145.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 986.20 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 144.8 MB in the beginning and 192.0 MB in the end (delta: -47.2 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<=1) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=1) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=1) [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: 914.9ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 16.2ms, AutomataDifference: 260.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 24 SDslu, 3 SDs, 0 SdLazy, 12 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7ms 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: 33.8ms 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...