/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/prodbin-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:55,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:55,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:55,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:55,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:55,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:55,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:55,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:55,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:55,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:55,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:55,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:55,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:55,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:55,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:55,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:55,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:55,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:55,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:55,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:55,775 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 08:24:55,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:55,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:55,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:55,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:55,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:55,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:55,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:55,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:55,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:55,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:55,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:55,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:55,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:55,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:55,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:55,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:55,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:55,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:55,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:55,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:55,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:55,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:55,801 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:55,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:56,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:56,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:56,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:56,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:56,134 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:56,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2021-05-01 08:24:56,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d9cade8/7bb2e6c8e4c04ff6952a3b2d81072fd9/FLAGa3be0fbf0 [2021-05-01 08:24:56,682 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:56,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2021-05-01 08:24:56,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d9cade8/7bb2e6c8e4c04ff6952a3b2d81072fd9/FLAGa3be0fbf0 [2021-05-01 08:24:57,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d9cade8/7bb2e6c8e4c04ff6952a3b2d81072fd9 [2021-05-01 08:24:57,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:57,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:57,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:57,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:57,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:57,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e056d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57, skipping insertion in model container [2021-05-01 08:24:57,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:57,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:57,152 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2021-05-01 08:24:57,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:57,171 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:57,182 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2021-05-01 08:24:57,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:57,199 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:57,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57 WrapperNode [2021-05-01 08:24:57,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:57,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:57,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:57,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:57,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (1/1) ... [2021-05-01 08:24:57,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:57,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:57,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:57,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:57,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (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 08:24:57,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:57,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:57,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:57,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:57,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:57,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:24:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:57,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:57,682 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:24:57,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:57 BoogieIcfgContainer [2021-05-01 08:24:57,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:57,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:57,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:57,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:57,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:57" (1/3) ... [2021-05-01 08:24:57,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f906595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:57, skipping insertion in model container [2021-05-01 08:24:57,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:57" (2/3) ... [2021-05-01 08:24:57,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f906595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:57, skipping insertion in model container [2021-05-01 08:24:57,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:57" (3/3) ... [2021-05-01 08:24:57,690 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2021-05-01 08:24:57,695 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:57,698 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:57,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:57,731 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:57,731 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:57,731 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:57,731 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:57,731 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:57,732 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:57,732 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:57,732 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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 08:24:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 08:24:57,751 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:57,752 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:57,753 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2021-05-01 08:24:57,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:57,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66888486] [2021-05-01 08:24:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:57,817 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:57,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:57,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:57,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:57,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:58,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:58,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:58,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,064 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:58,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:58,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-01 08:24:58,085 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:58,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66888486] [2021-05-01 08:24:58,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [66888486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:58,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:58,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:58,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931950150] [2021-05-01 08:24:58,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:58,108 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:24:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:58,283 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-01 08:24:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-01 08:24:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:58,296 INFO L225 Difference]: With dead ends: 57 [2021-05-01 08:24:58,296 INFO L226 Difference]: Without dead ends: 27 [2021-05-01 08:24:58,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-01 08:24:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-01 08:24:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 08:24:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-01 08:24:58,341 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2021-05-01 08:24:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:58,341 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-01 08:24:58,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:24:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-01 08:24:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 08:24:58,343 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:58,343 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:58,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:58,344 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2021-05-01 08:24:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805698555] [2021-05-01 08:24:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:58,348 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:58,365 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:58,366 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:58,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:58,381 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:58,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:58 BoogieIcfgContainer [2021-05-01 08:24:58,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:58,383 INFO L168 Benchmark]: Toolchain (without parser) took 1361.42 ms. Allocated memory is still 183.5 MB. Free memory was 149.1 MB in the beginning and 112.8 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:58,384 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 165.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:58,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.82 ms. Allocated memory is still 183.5 MB. Free memory was 148.9 MB in the beginning and 139.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:58,385 INFO L168 Benchmark]: Boogie Preprocessor took 80.90 ms. Allocated memory is still 183.5 MB. Free memory was 139.1 MB in the beginning and 167.3 MB in the end (delta: -28.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:58,385 INFO L168 Benchmark]: RCFGBuilder took 400.14 ms. Allocated memory is still 183.5 MB. Free memory was 166.8 MB in the beginning and 152.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:58,386 INFO L168 Benchmark]: TraceAbstraction took 697.41 ms. Allocated memory is still 183.5 MB. Free memory was 151.6 MB in the beginning and 112.8 MB in the end (delta: 38.8 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:58,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 165.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 177.82 ms. Allocated memory is still 183.5 MB. Free memory was 148.9 MB in the beginning and 139.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.90 ms. Allocated memory is still 183.5 MB. Free memory was 139.1 MB in the beginning and 167.3 MB in the end (delta: -28.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 400.14 ms. Allocated memory is still 183.5 MB. Free memory was 166.8 MB in the beginning and 152.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 697.41 ms. Allocated memory is still 183.5 MB. Free memory was 151.6 MB in the beginning and 112.8 MB in the end (delta: 38.8 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int a, b; [L22] long long x, y, z; [L24] a = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(a>=0 && a<=50) [L10] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a>=0 && a<=50) [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b>=0 && b<=50) [L10] COND FALSE !(!cond) [L27] RET assume_abort_if_not(b>=0 && b<=50) [L28] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) [L28] RET assume_abort_if_not(b >= 1) [L30] x = a [L31] y = b [L32] z = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(z + x * y == (long long) a * b) [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 641.2ms, OverallIterations: 2, TraceHistogramMax: 3, EmptinessCheckTime: 11.4ms, AutomataDifference: 204.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 19 SDslu, 3 SDs, 0 SdLazy, 8 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.7ms 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...