/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/lcm1_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:32:25,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:32:25,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:32:25,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:32:25,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:32:25,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:32:25,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:32:25,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:32:25,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:32:25,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:32:25,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:32:25,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:32:25,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:32:25,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:32:25,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:32:25,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:32:25,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:32:25,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:32:25,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:32:25,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:32:25,138 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 12:32:25,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:32:25,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:32:25,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:32:25,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:32:25,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:32:25,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:32:25,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:32:25,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:32:25,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:32:25,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:32:25,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:32:25,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:32:25,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:32:25,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:32:25,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:32:25,157 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:32:25,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:32:25,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:32:25,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:32:25,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:32:25,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:32:25,448 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:32:25,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c [2021-05-06 12:32:25,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36928b7b/cd03b64705d846a9be3cdba71c777671/FLAGeb349a2b7 [2021-05-06 12:32:25,850 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:32:25,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c [2021-05-06 12:32:25,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36928b7b/cd03b64705d846a9be3cdba71c777671/FLAGeb349a2b7 [2021-05-06 12:32:25,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36928b7b/cd03b64705d846a9be3cdba71c777671 [2021-05-06 12:32:25,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:32:25,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:32:25,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:32:25,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:32:25,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:32:25,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:32:25" (1/1) ... [2021-05-06 12:32:25,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609fb622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:25, skipping insertion in model container [2021-05-06 12:32:25,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:32:25" (1/1) ... [2021-05-06 12:32:25,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:32:25,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:32:25,972 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/lcm1_unwindbound20.c[560,573] [2021-05-06 12:32:25,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:32:25,987 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:32:26,034 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/lcm1_unwindbound20.c[560,573] [2021-05-06 12:32:26,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:32:26,062 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:32:26,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26 WrapperNode [2021-05-06 12:32:26,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:32:26,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:32:26,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:32:26,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:32:26,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (1/1) ... [2021-05-06 12:32:26,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:32:26,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:32:26,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:32:26,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:32:26,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (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 12:32:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:32:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:32:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:32:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:32:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:32:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:32:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:32:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:32:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:32:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:32:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 12:32:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:32:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:32:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:32:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:32:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:32:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:32:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:32:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:32:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:32:26,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:32:26,366 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 12:32:26,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:32:26 BoogieIcfgContainer [2021-05-06 12:32:26,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:32:26,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:32:26,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:32:26,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:32:26,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:32:25" (1/3) ... [2021-05-06 12:32:26,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5905f919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:32:26, skipping insertion in model container [2021-05-06 12:32:26,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:26" (2/3) ... [2021-05-06 12:32:26,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5905f919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:32:26, skipping insertion in model container [2021-05-06 12:32:26,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:32:26" (3/3) ... [2021-05-06 12:32:26,371 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound20.c [2021-05-06 12:32:26,375 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:32:26,377 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:32:26,387 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:32:26,400 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:32:26,400 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:32:26,400 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:32:26,400 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:32:26,400 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:32:26,400 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:32:26,400 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:32:26,400 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:32:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 12:32:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 12:32:26,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:26,427 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:26,428 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1515787587, now seen corresponding path program 1 times [2021-05-06 12:32:26,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:26,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045667282] [2021-05-06 12:32:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:26,474 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:26,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:32:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:26,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:32:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:26,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:32:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:26,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-06 12:32:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 12:32:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 12:32:26,632 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:32:26,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045667282] [2021-05-06 12:32:26,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045667282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:32:26,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:32:26,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:32:26,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316742719] [2021-05-06 12:32:26,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:32:26,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:32:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:32:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:32:26,646 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 12:32:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:32:26,790 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2021-05-06 12:32:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:32:26,792 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 12:32:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:32:26,796 INFO L225 Difference]: With dead ends: 74 [2021-05-06 12:32:26,796 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 12:32:26,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:32:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 12:32:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 12:32:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 12:32:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-05-06 12:32:26,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2021-05-06 12:32:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:32:26,847 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-05-06 12:32:26,847 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 12:32:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-05-06 12:32:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:32:26,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:26,852 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:26,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:32:26,853 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash 182383832, now seen corresponding path program 1 times [2021-05-06 12:32:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:26,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422763109] [2021-05-06 12:32:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:26,861 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:26,884 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:32:26,884 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:32:26,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:32:26,916 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:32:26,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:32:26 BoogieIcfgContainer [2021-05-06 12:32:26,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:32:26,918 INFO L168 Benchmark]: Toolchain (without parser) took 1049.70 ms. Allocated memory is still 222.3 MB. Free memory was 186.6 MB in the beginning and 183.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:26,919 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 222.3 MB. Free memory is still 203.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:32:26,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.78 ms. Allocated memory is still 222.3 MB. Free memory was 186.3 MB in the beginning and 204.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:26,921 INFO L168 Benchmark]: Boogie Preprocessor took 50.30 ms. Allocated memory is still 222.3 MB. Free memory was 204.6 MB in the beginning and 202.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:26,921 INFO L168 Benchmark]: RCFGBuilder took 253.05 ms. Allocated memory is still 222.3 MB. Free memory was 202.8 MB in the beginning and 186.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:26,922 INFO L168 Benchmark]: TraceAbstraction took 548.79 ms. Allocated memory is still 222.3 MB. Free memory was 185.7 MB in the beginning and 183.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:26,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 222.3 MB. Free memory is still 203.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 192.78 ms. Allocated memory is still 222.3 MB. Free memory was 186.3 MB in the beginning and 204.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.30 ms. Allocated memory is still 222.3 MB. Free memory was 204.6 MB in the beginning and 202.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 253.05 ms. Allocated memory is still 222.3 MB. Free memory was 202.8 MB in the beginning and 186.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 548.79 ms. Allocated memory is still 222.3 MB. Free memory was 185.7 MB in the beginning and 183.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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: [L22] int counter = 0; [L24] unsigned a, b; [L25] unsigned x, y, u, v; [L26] a = __VERIFIER_nondet_unsigned_int() [L27] b = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(a >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a >= 1) [L29] CALL assume_abort_if_not(b >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(b >= 1) [L31] CALL assume_abort_if_not(a <= 65535) [L12] COND FALSE !(!cond) [L31] RET assume_abort_if_not(a <= 65535) [L32] CALL assume_abort_if_not(b <= 65535) [L12] COND FALSE !(!cond) [L32] RET assume_abort_if_not(b <= 65535) [L34] x = a [L35] y = b [L36] u = b [L37] v = 0 [L39] EXPR counter++ [L39] COND FALSE !(counter++<20) [L61] CALL __VERIFIER_assert(u*y + v*y == a*b) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 504.9ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 24.4ms, AutomataDifference: 162.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 29 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.6ms 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...