/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:25:29,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:25:29,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:25:29,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 08:25:29,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 08:25:29,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 08:25:29,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 08:25:29,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 08:25:29,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 08:25:29,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 08:25:29,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 08:25:29,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 08:25:29,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:25:29,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:25:29,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:25:29,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:25:29,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:25:29,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:25:29,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:25:29,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:25:29,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:25:29,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:25:29,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:25:29,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:25:29,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:25:29,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:25:29,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:25:29,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:25:29,869 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 08:25:29,882 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:25:29,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:25:29,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:25:29,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:25:29,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:25:29,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:25:29,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:25:29,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:25:29,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:25:29,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:25:29,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:25:29,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:25:29,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:25:29,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:25:29,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:25:29,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:25:29,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:25:29,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:25:29,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:25:29,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:25:29,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:25:29,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:25:29,888 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:25:29,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:25:30,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:25:30,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:25:30,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:25:30,214 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:25:30,215 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:25:30,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2021-05-01 08:25:30,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f26a6e12/4bc485b4cbac45b5aa4ffb7c6aa8f23f/FLAG6b0462294 [2021-05-01 08:25:30,633 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:25:30,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2021-05-01 08:25:30,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f26a6e12/4bc485b4cbac45b5aa4ffb7c6aa8f23f/FLAG6b0462294 [2021-05-01 08:25:31,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f26a6e12/4bc485b4cbac45b5aa4ffb7c6aa8f23f [2021-05-01 08:25:31,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:25:31,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:25:31,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:25:31,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:25:31,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:25:31,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11352e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31, skipping insertion in model container [2021-05-01 08:25:31,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:25:31,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:25:31,194 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/ps6-ll_valuebound20.c[458,471] [2021-05-01 08:25:31,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:25:31,214 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:25:31,223 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/ps6-ll_valuebound20.c[458,471] [2021-05-01 08:25:31,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:25:31,238 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:25:31,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31 WrapperNode [2021-05-01 08:25:31,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:25:31,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:25:31,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:25:31,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:25:31,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (1/1) ... [2021-05-01 08:25:31,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:25:31,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:25:31,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:25:31,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:25:31,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (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 08:25:31,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:25:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:25:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:25:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:25:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:25:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:25:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:25:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:25:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:25:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:25:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:25:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:25:31,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:25:31,566 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:25:31,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:31 BoogieIcfgContainer [2021-05-01 08:25:31,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:25:31,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:25:31,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:25:31,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:25:31,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:25:31" (1/3) ... [2021-05-01 08:25:31,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a48a8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:31, skipping insertion in model container [2021-05-01 08:25:31,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:31" (2/3) ... [2021-05-01 08:25:31,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a48a8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:31, skipping insertion in model container [2021-05-01 08:25:31,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:31" (3/3) ... [2021-05-01 08:25:31,585 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound20.c [2021-05-01 08:25:31,590 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:25:31,593 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:25:31,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:25:31,636 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:25:31,637 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:25:31,637 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:25:31,637 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:25:31,637 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:25:31,637 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:25:31,637 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:25:31,637 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:25:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 08:25:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-01 08:25:31,654 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:25:31,654 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:25:31,654 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:25:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:25:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-01 08:25:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:25:31,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993079187] [2021-05-01 08:25:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:25:31,727 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:25:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:25:31,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:25:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:25:31,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:25:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:25:31,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:25:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:25:31,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:25:31,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:25:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:25:31,882 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:25:31,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993079187] [2021-05-01 08:25:31,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993079187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:25:31,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:25:31,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:25:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52443520] [2021-05-01 08:25:31,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:25:31,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:25:31,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:25:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:25:31,905 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:25:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:25:32,204 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-01 08:25:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:25:32,206 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-01 08:25:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:25:32,211 INFO L225 Difference]: With dead ends: 51 [2021-05-01 08:25:32,211 INFO L226 Difference]: Without dead ends: 24 [2021-05-01 08:25:32,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:25:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-01 08:25:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-01 08:25:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 08:25:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-01 08:25:32,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-01 08:25:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:25:32,249 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-01 08:25:32,249 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:25:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-01 08:25:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-01 08:25:32,250 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:25:32,250 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:25:32,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:25:32,251 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:25:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:25:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-01 08:25:32,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:25:32,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589735570] [2021-05-01 08:25:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:25:32,254 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:25:32,269 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:25:32,270 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:25:32,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:25:32,281 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:25:32,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:25:32 BoogieIcfgContainer [2021-05-01 08:25:32,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:25:32,282 INFO L168 Benchmark]: Toolchain (without parser) took 1207.80 ms. Allocated memory is still 201.3 MB. Free memory was 166.9 MB in the beginning and 132.1 MB in the end (delta: 34.8 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:25:32,283 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 201.3 MB. Free memory is still 183.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:25:32,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.75 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 156.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:25:32,284 INFO L168 Benchmark]: Boogie Preprocessor took 50.64 ms. Allocated memory is still 201.3 MB. Free memory was 156.7 MB in the beginning and 184.0 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:25:32,284 INFO L168 Benchmark]: RCFGBuilder took 275.84 ms. Allocated memory is still 201.3 MB. Free memory was 184.0 MB in the beginning and 169.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:25:32,284 INFO L168 Benchmark]: TraceAbstraction took 713.11 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 132.1 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:25:32,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 201.3 MB. Free memory is still 183.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.75 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 156.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.64 ms. Allocated memory is still 201.3 MB. Free memory was 156.7 MB in the beginning and 184.0 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 275.84 ms. Allocated memory is still 201.3 MB. Free memory was 184.0 MB in the beginning and 169.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 713.11 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 132.1 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 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>=0 && k<=20) [L7] COND FALSE !(!cond) [L21] RET assume_abort_if_not(k>=0 && k<=20) [L22] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) [L22] RET assume_abort_if_not(k <= 256) [L24] y = 0 [L25] x = 0 [L26] c = 0 [L28] COND TRUE 1 [L29] 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 638.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 10.2ms, AutomataDifference: 325.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 15 SDslu, 3 SDs, 0 SdLazy, 8 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 217.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 25.2ms 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...