/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/bresenham-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:02:01,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:02:01,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:02:01,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 08:02:01,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:02:01,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:02:01,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:02:01,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:02:01,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:02:01,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:02:01,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:02:01,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:02:01,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:02:01,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:02:01,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:02:01,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:02:01,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:02:01,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:02:01,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:02:01,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:02:01,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:02:01,595 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:02:01,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:02:01,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:02:01,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:02:01,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:02:01,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:02:01,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:02:01,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:02:01,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:02:01,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:02:01,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:02:01,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:02:01,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:02:01,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:02:01,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:02:01,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:02:01,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:02:01,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:02:01,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:02:01,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:02:01,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:02:01,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:02:01,599 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:02:01,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:02:01,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:02:01,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:02:01,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:02:01,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:02:01,944 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:02:01,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-04-16 08:02:01,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d7e17951/f4d498d830ed43d58c3de6d3b95c858e/FLAGb4a8442f1 [2021-04-16 08:02:02,408 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:02:02,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-04-16 08:02:02,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d7e17951/f4d498d830ed43d58c3de6d3b95c858e/FLAGb4a8442f1 [2021-04-16 08:02:02,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d7e17951/f4d498d830ed43d58c3de6d3b95c858e [2021-04-16 08:02:02,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:02:02,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:02:02,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:02:02,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:02:02,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:02:02,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:02:02" (1/1) ... [2021-04-16 08:02:02,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5b00fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:02, skipping insertion in model container [2021-04-16 08:02:02,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:02:02" (1/1) ... [2021-04-16 08:02:02,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:02:02,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:02:03,023 WARN L226 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/bresenham-ll_unwindbound2.c[597,610] [2021-04-16 08:02:03,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:02:03,042 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:02:03,051 WARN L226 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/bresenham-ll_unwindbound2.c[597,610] [2021-04-16 08:02:03,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:02:03,065 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:02:03,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03 WrapperNode [2021-04-16 08:02:03,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:02:03,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:02:03,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:02:03,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:02:03,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (1/1) ... [2021-04-16 08:02:03,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:02:03,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:02:03,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:02:03,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:02:03,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (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 [2021-04-16 08:02:03,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:02:03,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:02:03,196 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:02:03,196 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:02:03,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:02:03,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:02:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:02:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:02:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:02:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:02:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:02:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:02:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:02:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:02:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:02:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:02:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:02:03,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:02:03,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:02:03,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:02:03,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:02:03,478 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 08:02:03,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:02:03 BoogieIcfgContainer [2021-04-16 08:02:03,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:02:03,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:02:03,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:02:03,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:02:03,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:02:02" (1/3) ... [2021-04-16 08:02:03,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c65c1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:02:03, skipping insertion in model container [2021-04-16 08:02:03,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:02:03" (2/3) ... [2021-04-16 08:02:03,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c65c1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:02:03, skipping insertion in model container [2021-04-16 08:02:03,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:02:03" (3/3) ... [2021-04-16 08:02:03,503 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2021-04-16 08:02:03,507 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:02:03,510 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:02:03,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:02:03,561 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:02:03,561 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:02:03,562 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:02:03,562 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:02:03,562 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:02:03,562 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:02:03,562 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:02:03,562 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:02:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-04-16 08:02:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 08:02:03,584 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:02:03,585 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:02:03,585 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:02:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:02:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2021-04-16 08:02:03,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:02:03,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438694364] [2021-04-16 08:02:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:02:03,652 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:02:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:02:03,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:02:03,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:02:03,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:02:03,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:02:03,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:02:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:02:03,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:02:03,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:02:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:02:03,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438694364] [2021-04-16 08:02:03,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:02:03,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:02:03,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719468523] [2021-04-16 08:02:03,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:02:03,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:02:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:02:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:02:03,884 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 08:02:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:02:03,990 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-04-16 08:02:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:02:03,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 08:02:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:02:04,001 INFO L225 Difference]: With dead ends: 45 [2021-04-16 08:02:04,001 INFO L226 Difference]: Without dead ends: 21 [2021-04-16 08:02:04,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:02:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-04-16 08:02:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-04-16 08:02:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 08:02:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-04-16 08:02:04,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-04-16 08:02:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:02:04,054 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-04-16 08:02:04,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 08:02:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-04-16 08:02:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 08:02:04,055 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:02:04,055 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:02:04,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:02:04,056 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:02:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:02:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2021-04-16 08:02:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:02:04,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542525878] [2021-04-16 08:02:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:02:04,065 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:02:04,081 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:02:04,082 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:02:04,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:02:04,105 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:02:04,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:02:04 BoogieIcfgContainer [2021-04-16 08:02:04,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:02:04,109 INFO L168 Benchmark]: Toolchain (without parser) took 1239.17 ms. Allocated memory is still 194.0 MB. Free memory was 160.9 MB in the beginning and 130.0 MB in the end (delta: 30.9 MB). Peak memory consumption was 30.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:02:04,110 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 194.0 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:02:04,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.25 ms. Allocated memory is still 194.0 MB. Free memory was 160.7 MB in the beginning and 150.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:02:04,111 INFO L168 Benchmark]: Boogie Preprocessor took 21.73 ms. Allocated memory is still 194.0 MB. Free memory was 150.8 MB in the beginning and 149.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:02:04,112 INFO L168 Benchmark]: RCFGBuilder took 390.46 ms. Allocated memory is still 194.0 MB. Free memory was 149.3 MB in the beginning and 163.6 MB in the end (delta: -14.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:02:04,113 INFO L168 Benchmark]: TraceAbstraction took 625.14 ms. Allocated memory is still 194.0 MB. Free memory was 163.5 MB in the beginning and 130.5 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-04-16 08:02:04,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 194.0 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.25 ms. Allocated memory is still 194.0 MB. Free memory was 160.7 MB in the beginning and 150.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.73 ms. Allocated memory is still 194.0 MB. Free memory was 150.8 MB in the beginning and 149.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.46 ms. Allocated memory is still 194.0 MB. Free memory was 149.3 MB in the beginning and 163.6 MB in the end (delta: -14.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 625.14 ms. Allocated memory is still 194.0 MB. Free memory was 163.5 MB in the beginning and 130.5 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 [L31] EXPR counter++ [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 528.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.1ms, AutomataDifference: 130.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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: 36.1ms AutomataMinimizationTime, 1 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...