/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps6-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:19:34,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:19:34,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:19:34,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:19:34,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:19:34,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:19:34,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:19:34,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:19:34,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:19:34,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:19:34,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:19:34,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:19:34,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:19:34,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:19:34,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:19:34,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:19:34,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:19:34,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:19:34,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:19:34,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:19:34,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:19:34,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:19:34,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:19:34,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:19:34,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:19:34,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:19:34,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:19:34,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:19:34,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:19:34,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:19:34,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:19:34,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:19:34,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:19:34,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:19:34,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:19:34,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:19:34,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:19:34,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:19:34,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:19:34,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:19:34,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:19:34,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:19:34,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:19:34,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:19:34,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:19:34,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:19:34,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:19:34,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:19:34,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:19:34,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:19:34,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:19:34,869 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:19:34,869 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:19:35,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:19:35,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:19:35,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:19:35,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:19:35,359 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:19:35,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6-ll.c [2021-05-01 08:19:35,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecaacf7e/9f7b912e25eb4409975f3f07286ea1bc/FLAGac9d8e91e [2021-05-01 08:19:36,070 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:19:36,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6-ll.c [2021-05-01 08:19:36,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecaacf7e/9f7b912e25eb4409975f3f07286ea1bc/FLAGac9d8e91e [2021-05-01 08:19:36,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecaacf7e/9f7b912e25eb4409975f3f07286ea1bc [2021-05-01 08:19:36,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:19:36,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:19:36,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:36,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:19:36,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:19:36,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@adbd489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36, skipping insertion in model container [2021-05-01 08:19:36,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:19:36,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:19:36,596 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/ps6-ll.c[458,471] [2021-05-01 08:19:36,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:36,637 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:19:36,654 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/ps6-ll.c[458,471] [2021-05-01 08:19:36,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:36,705 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:19:36,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36 WrapperNode [2021-05-01 08:19:36,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:36,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:19:36,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:19:36,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:19:36,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (1/1) ... [2021-05-01 08:19:36,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:19:36,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:19:36,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:19:36,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:19:36,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (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 [2021-05-01 08:19:36,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:19:36,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:19:36,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:19:36,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:19:36,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:19:36,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:19:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:19:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:19:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:19:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:19:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-01 08:19:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:19:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:19:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:19:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:19:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:19:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:19:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:19:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:19:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:19:37,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:19:37,327 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:19:37,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:37 BoogieIcfgContainer [2021-05-01 08:19:37,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:19:37,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:19:37,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:19:37,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:19:37,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:19:36" (1/3) ... [2021-05-01 08:19:37,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227d7885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:37, skipping insertion in model container [2021-05-01 08:19:37,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:36" (2/3) ... [2021-05-01 08:19:37,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227d7885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:37, skipping insertion in model container [2021-05-01 08:19:37,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:37" (3/3) ... [2021-05-01 08:19:37,338 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll.c [2021-05-01 08:19:37,353 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:19:37,358 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:19:37,410 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:19:37,449 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:19:37,449 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:19:37,449 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:19:37,449 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:19:37,449 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:19:37,450 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:19:37,450 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:19:37,450 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:19:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2021-05-01 08:19:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-01 08:19:37,489 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:37,491 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:37,492 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-01 08:19:37,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:37,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82635240] [2021-05-01 08:19:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:37,596 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:37,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:37,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:37,764 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:37,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:37,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:37,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:37,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:37,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:19:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:37,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:37,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:37,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:37,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:19:37,926 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82635240] [2021-05-01 08:19:37,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [82635240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:37,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:37,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:19:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130297836] [2021-05-01 08:19:37,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:19:37,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:19:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:37,966 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2021-05-01 08:19:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:46,141 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-01 08:19:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:19:46,144 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 [2021-05-01 08:19:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:46,153 INFO L225 Difference]: With dead ends: 47 [2021-05-01 08:19:46,153 INFO L226 Difference]: Without dead ends: 23 [2021-05-01 08:19:46,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-01 08:19:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-01 08:19:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-05-01 08:19:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-01 08:19:46,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-01 08:19:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:46,224 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-01 08:19:46,225 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) [2021-05-01 08:19:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-01 08:19:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-01 08:19:46,229 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:46,229 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:46,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:19:46,229 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-01 08:19:46,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:46,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617809141] [2021-05-01 08:19:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:46,235 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:46,254 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:19:46,255 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:19:46,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:19:46,280 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:19:46,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:19:46 BoogieIcfgContainer [2021-05-01 08:19:46,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:19:46,284 INFO L168 Benchmark]: Toolchain (without parser) took 9912.38 ms. Allocated memory is still 194.0 MB. Free memory was 159.8 MB in the beginning and 127.5 MB in the end (delta: 32.2 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:46,285 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 194.0 MB. Free memory is still 176.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:19:46,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.47 ms. Allocated memory is still 194.0 MB. Free memory was 159.6 MB in the beginning and 149.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:46,288 INFO L168 Benchmark]: Boogie Preprocessor took 108.57 ms. Allocated memory is still 194.0 MB. Free memory was 149.8 MB in the beginning and 177.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:46,289 INFO L168 Benchmark]: RCFGBuilder took 509.13 ms. Allocated memory is still 194.0 MB. Free memory was 177.5 MB in the beginning and 163.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:46,289 INFO L168 Benchmark]: TraceAbstraction took 8950.53 ms. Allocated memory is still 194.0 MB. Free memory was 163.2 MB in the beginning and 127.5 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:46,295 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 194.0 MB. Free memory is still 176.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 332.47 ms. Allocated memory is still 194.0 MB. Free memory was 159.6 MB in the beginning and 149.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 108.57 ms. Allocated memory is still 194.0 MB. Free memory was 149.8 MB in the beginning and 177.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 509.13 ms. Allocated memory is still 194.0 MB. Free memory was 177.5 MB in the beginning and 163.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8950.53 ms. Allocated memory is still 194.0 MB. Free memory was 163.2 MB in the beginning and 127.5 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: 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: [L18] short k; [L19] long long y, x, c; [L20] k = __VERIFIER_nondet_short() [L21] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) [L21] RET assume_abort_if_not(k <= 256) [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 8819.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 22.4ms, AutomataDifference: 8217.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 15 SDslu, 3 SDs, 0 SdLazy, 5 SolverSat, 6 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 8070.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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: 49.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...