/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/prod4br-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:45:34,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:45:34,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:45:34,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:45:34,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:45:34,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:45:34,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:45:34,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:45:34,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:45:34,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:45:34,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:45:34,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:45:34,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:45:34,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:45:34,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:45:34,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:45:34,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:45:34,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:45:34,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:45:34,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:45:34,332 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 00:45:34,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:45:34,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:45:34,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:45:34,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:45:34,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:45:34,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:45:34,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:45:34,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:45:34,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:45:34,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:45:34,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:45:34,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:45:34,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:45:34,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:45:34,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:45:34,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:45:34,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:45:34,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:45:34,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:45:34,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:45:34,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:45:34,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:45:34,349 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:45:34,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:45:34,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:45:34,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:45:34,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:45:34,644 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:45:34,645 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:45:34,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2021-05-03 00:45:34,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014c8c243/bb5f0658e9404d68a3adc95daa99249a/FLAG8aa63c593 [2021-05-03 00:45:35,145 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:45:35,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2021-05-03 00:45:35,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014c8c243/bb5f0658e9404d68a3adc95daa99249a/FLAG8aa63c593 [2021-05-03 00:45:35,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014c8c243/bb5f0658e9404d68a3adc95daa99249a [2021-05-03 00:45:35,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:45:35,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:45:35,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:45:35,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:45:35,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:45:35,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5242d91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35, skipping insertion in model container [2021-05-03 00:45:35,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:45:35,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:45:35,328 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/prod4br-ll_unwindbound5.c[524,537] [2021-05-03 00:45:35,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:45:35,362 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:45:35,376 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/prod4br-ll_unwindbound5.c[524,537] [2021-05-03 00:45:35,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:45:35,474 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:45:35,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35 WrapperNode [2021-05-03 00:45:35,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:45:35,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:45:35,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:45:35,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:45:35,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (1/1) ... [2021-05-03 00:45:35,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:45:35,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:45:35,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:45:35,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:45:35,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (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 00:45:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:45:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:45:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:45:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:45:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:45:35,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:45:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:45:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:45:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:45:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:45:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:45:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:45:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:45:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:45:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:45:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:45:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:45:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:45:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:45:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:45:35,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:45:35,987 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:45:35,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:45:35 BoogieIcfgContainer [2021-05-03 00:45:35,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:45:35,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:45:35,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:45:35,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:45:35,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:45:35" (1/3) ... [2021-05-03 00:45:35,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e70d25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:45:35, skipping insertion in model container [2021-05-03 00:45:35,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:35" (2/3) ... [2021-05-03 00:45:35,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e70d25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:45:35, skipping insertion in model container [2021-05-03 00:45:35,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:45:35" (3/3) ... [2021-05-03 00:45:35,995 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2021-05-03 00:45:36,000 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:45:36,004 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:45:36,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:45:36,046 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:45:36,046 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:45:36,047 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:45:36,047 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:45:36,047 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:45:36,047 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:45:36,047 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:45:36,047 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:45:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:45:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:45:36,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:36,072 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:36,072 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2021-05-03 00:45:36,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:36,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619655033] [2021-05-03 00:45:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:36,149 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:36,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:45:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:45:36,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:36,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619655033] [2021-05-03 00:45:36,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [619655033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:36,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:36,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:45:36,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190754198] [2021-05-03 00:45:36,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:45:36,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:45:36,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:45:36,416 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2021-05-03 00:45:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:36,576 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-03 00:45:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:45:36,578 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 [2021-05-03 00:45:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:36,588 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:45:36,588 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:45:36,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:45:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:45:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-03 00:45:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-03 00:45:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-03 00:45:36,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-03 00:45:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:36,650 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-03 00:45:36,650 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) [2021-05-03 00:45:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-03 00:45:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:45:36,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:36,651 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:36,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:45:36,651 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2021-05-03 00:45:36,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:36,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60318062] [2021-05-03 00:45:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:36,655 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:36,669 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:45:36,669 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:45:36,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:45:36,684 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:45:36,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:45:36 BoogieIcfgContainer [2021-05-03 00:45:36,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:45:36,687 INFO L168 Benchmark]: Toolchain (without parser) took 1517.88 ms. Allocated memory is still 200.3 MB. Free memory was 165.1 MB in the beginning and 177.3 MB in the end (delta: -12.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:36,688 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 200.3 MB. Free memory is still 181.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:36,688 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.95 ms. Allocated memory is still 200.3 MB. Free memory was 164.8 MB in the beginning and 183.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:36,690 INFO L168 Benchmark]: Boogie Preprocessor took 48.47 ms. Allocated memory is still 200.3 MB. Free memory was 183.5 MB in the beginning and 182.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:36,691 INFO L168 Benchmark]: RCFGBuilder took 462.40 ms. Allocated memory is still 200.3 MB. Free memory was 182.2 MB in the beginning and 165.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:36,691 INFO L168 Benchmark]: TraceAbstraction took 694.57 ms. Allocated memory is still 200.3 MB. Free memory was 165.4 MB in the beginning and 177.3 MB in the end (delta: -11.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:36,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 200.3 MB. Free memory is still 181.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.95 ms. Allocated memory is still 200.3 MB. Free memory was 164.8 MB in the beginning and 183.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.47 ms. Allocated memory is still 200.3 MB. Free memory was 183.5 MB in the beginning and 182.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 462.40 ms. Allocated memory is still 200.3 MB. Free memory was 182.2 MB in the beginning and 165.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 694.57 ms. Allocated memory is still 200.3 MB. Free memory was 165.4 MB in the beginning and 177.3 MB in the end (delta: -11.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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 counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L33] EXPR counter++ [L33] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(q == (long long) x * y) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 629.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.2ms, AutomataDifference: 195.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: 43.2ms 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...