/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/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:33:09,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:33:09,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:33:09,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:33:09,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:33:09,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:33:09,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:33:09,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:33:09,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:33:09,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:33:09,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:33:09,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:33:09,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:33:09,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:33:09,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:33:09,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:33:09,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:33:09,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:33:09,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:33:09,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:33:09,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:33:09,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:33:09,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:33:09,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:33:09,982 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:33:09,982 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:33:10,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:33:10,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:33:10,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:33:10,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:33:10,253 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:33:10,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-06 12:33:10,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c4ccfca2/0d4d11608d3141e69bceb15588cfa0e5/FLAG20792cc3b [2021-05-06 12:33:10,676 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:33:10,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-06 12:33:10,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c4ccfca2/0d4d11608d3141e69bceb15588cfa0e5/FLAG20792cc3b [2021-05-06 12:33:10,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c4ccfca2/0d4d11608d3141e69bceb15588cfa0e5 [2021-05-06 12:33:10,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:33:10,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:33:10,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:33:10,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:33:10,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:33:10,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380a1c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10, skipping insertion in model container [2021-05-06 12:33:10,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:33:10,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:33:10,832 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-06 12:33:10,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:33:10,848 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:33:10,857 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-06 12:33:10,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:33:10,904 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:33:10,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10 WrapperNode [2021-05-06 12:33:10,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:33:10,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:33:10,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:33:10,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:33:10,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... [2021-05-06 12:33:10,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:33:10,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:33:10,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:33:10,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:33:10,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:33:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:33:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:33:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:33:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:33:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:33:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:33:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:33:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:33:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:33:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:33:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:33:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:33:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:33:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:33:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:33:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:33:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:33:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:33:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:33:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:33:11,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:33:11,244 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:33:11,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:33:11 BoogieIcfgContainer [2021-05-06 12:33:11,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:33:11,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:33:11,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:33:11,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:33:11,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:33:10" (1/3) ... [2021-05-06 12:33:11,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e3f2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:33:11, skipping insertion in model container [2021-05-06 12:33:11,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:33:10" (2/3) ... [2021-05-06 12:33:11,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e3f2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:33:11, skipping insertion in model container [2021-05-06 12:33:11,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:33:11" (3/3) ... [2021-05-06 12:33:11,249 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2021-05-06 12:33:11,271 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:33:11,275 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:33:11,289 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:33:11,303 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:33:11,303 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:33:11,303 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:33:11,303 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:33:11,304 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:33:11,304 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:33:11,304 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:33:11,304 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:33:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 12:33:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 12:33:11,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:33:11,323 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:33:11,323 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:33:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:33:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2021-05-06 12:33:11,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:33:11,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168128393] [2021-05-06 12:33:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:33:11,379 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:33:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:33:11,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:33:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:33:11,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:33:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:33:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:33:11,565 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:33:11,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168128393] [2021-05-06 12:33:11,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168128393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:33:11,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:33:11,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:33:11,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743298305] [2021-05-06 12:33:11,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:33:11,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:33:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:33:11,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:33:11,579 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:33:11,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:33:11,636 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 12:33:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:33:11,638 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 12:33:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:33:11,662 INFO L225 Difference]: With dead ends: 52 [2021-05-06 12:33:11,662 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 12:33:11,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:33:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 12:33:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 12:33:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 12:33:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 12:33:11,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 12:33:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:33:11,691 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 12:33:11,691 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:33:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 12:33:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 12:33:11,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:33:11,691 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:33:11,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:33:11,692 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:33:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:33:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2021-05-06 12:33:11,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:33:11,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829454074] [2021-05-06 12:33:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:33:11,694 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:33:11,704 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:33:11,704 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:33:11,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:33:11,715 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:33:11,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:33:11 BoogieIcfgContainer [2021-05-06 12:33:11,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:33:11,716 INFO L168 Benchmark]: Toolchain (without parser) took 1016.12 ms. Allocated memory is still 184.5 MB. Free memory was 149.3 MB in the beginning and 160.4 MB in the end (delta: -11.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:33:11,716 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 165.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:33:11,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.68 ms. Allocated memory is still 184.5 MB. Free memory was 149.1 MB in the beginning and 168.2 MB in the end (delta: -19.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:33:11,717 INFO L168 Benchmark]: Boogie Preprocessor took 33.19 ms. Allocated memory is still 184.5 MB. Free memory was 168.2 MB in the beginning and 166.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:33:11,718 INFO L168 Benchmark]: RCFGBuilder took 297.73 ms. Allocated memory is still 184.5 MB. Free memory was 166.5 MB in the beginning and 151.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:33:11,718 INFO L168 Benchmark]: TraceAbstraction took 469.71 ms. Allocated memory is still 184.5 MB. Free memory was 151.5 MB in the beginning and 160.4 MB in the end (delta: -8.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:33:11,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 165.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 208.68 ms. Allocated memory is still 184.5 MB. Free memory was 149.1 MB in the beginning and 168.2 MB in the end (delta: -19.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.19 ms. Allocated memory is still 184.5 MB. Free memory was 168.2 MB in the beginning and 166.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 297.73 ms. Allocated memory is still 184.5 MB. Free memory was 166.5 MB in the beginning and 151.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 469.71 ms. Allocated memory is still 184.5 MB. Free memory was 151.5 MB in the beginning and 160.4 MB in the end (delta: -8.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L20] int counter = 0; [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) [L27] RET assume_abort_if_not(b >= 1) [L29] x = a [L30] y = b [L31] z = 0 [L33] EXPR counter++ [L33] COND FALSE !(counter++<1) [L45] CALL __VERIFIER_assert(z == (long long) a * b) [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 406.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 10.3ms, AutomataDifference: 93.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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: 17.5ms 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...