/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/lcm1_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:26,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:26,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:26,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:26,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:26,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:26,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:26,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:26,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:26,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:26,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:26,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:26,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:26,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:26,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:26,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:26,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:26,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:26,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:26,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:26,940 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 08:24:26,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:26,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:26,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:26,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:26,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:26,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:26,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:26,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:26,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:26,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:26,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:26,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:26,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:26,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:26,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:26,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:26,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:26,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:26,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:26,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:26,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:26,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:26,954 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:26,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:27,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:27,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:27,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:27,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:27,301 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:27,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c [2021-05-01 08:24:27,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd85a7a05/8306cf9708874d58b2c93c6a1c4c6a46/FLAG9ac15de41 [2021-05-01 08:24:27,797 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:27,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c [2021-05-01 08:24:27,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd85a7a05/8306cf9708874d58b2c93c6a1c4c6a46/FLAG9ac15de41 [2021-05-01 08:24:28,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd85a7a05/8306cf9708874d58b2c93c6a1c4c6a46 [2021-05-01 08:24:28,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:28,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:28,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:28,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:28,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:28,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@80104b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28, skipping insertion in model container [2021-05-01 08:24:28,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:28,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:28,318 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c[560,573] [2021-05-01 08:24:28,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:28,337 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:28,371 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c[560,573] [2021-05-01 08:24:28,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:28,436 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:28,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28 WrapperNode [2021-05-01 08:24:28,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:28,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:28,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:28,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:28,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (1/1) ... [2021-05-01 08:24:28,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:28,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:28,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:28,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:28,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (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 08:24:28,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:24:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:28,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:28,926 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-01 08:24:28,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:28 BoogieIcfgContainer [2021-05-01 08:24:28,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:28,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:28,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:28,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:28,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:28" (1/3) ... [2021-05-01 08:24:28,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2990bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:28, skipping insertion in model container [2021-05-01 08:24:28,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:28" (2/3) ... [2021-05-01 08:24:28,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2990bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:28, skipping insertion in model container [2021-05-01 08:24:28,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:28" (3/3) ... [2021-05-01 08:24:28,940 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound2.c [2021-05-01 08:24:28,943 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:28,945 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:28,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:28,977 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:28,977 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:28,977 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:28,977 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:28,977 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:28,977 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:28,977 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:28,977 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-01 08:24:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:29,002 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:29,003 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:29,003 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 1 times [2021-05-01 08:24:29,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:29,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685944335] [2021-05-01 08:24:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:29,059 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:24:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 08:24:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 08:24:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:29,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:29,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-01 08:24:29,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685944335] [2021-05-01 08:24:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [685944335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:29,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:29,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:29,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471439326] [2021-05-01 08:24:29,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:29,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:29,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:29,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:29,225 INFO L87 Difference]: Start difference. First operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 08:24:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:29,382 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2021-05-01 08:24:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:29,385 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-01 08:24:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:29,391 INFO L225 Difference]: With dead ends: 73 [2021-05-01 08:24:29,392 INFO L226 Difference]: Without dead ends: 35 [2021-05-01 08:24:29,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-01 08:24:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-01 08:24:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 08:24:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-01 08:24:29,450 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-01 08:24:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:29,451 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-01 08:24:29,451 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 08:24:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-01 08:24:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:29,459 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:29,459 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:29,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:29,460 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 1 times [2021-05-01 08:24:29,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:29,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949873338] [2021-05-01 08:24:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:29,470 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:29,506 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:29,506 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:29,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:29,529 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:29,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:29 BoogieIcfgContainer [2021-05-01 08:24:29,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:29,533 INFO L168 Benchmark]: Toolchain (without parser) took 1341.62 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 70.7 MB in the end (delta: 50.0 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:29,540 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 156.2 MB. Free memory is still 137.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:29,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.61 ms. Allocated memory is still 156.2 MB. Free memory was 120.5 MB in the beginning and 138.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:29,543 INFO L168 Benchmark]: Boogie Preprocessor took 49.73 ms. Allocated memory is still 156.2 MB. Free memory was 138.9 MB in the beginning and 137.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:29,543 INFO L168 Benchmark]: RCFGBuilder took 445.74 ms. Allocated memory is still 156.2 MB. Free memory was 137.3 MB in the beginning and 120.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:29,544 INFO L168 Benchmark]: TraceAbstraction took 595.47 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 70.7 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:29,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 156.2 MB. Free memory is still 137.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.61 ms. Allocated memory is still 156.2 MB. Free memory was 120.5 MB in the beginning and 138.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.73 ms. Allocated memory is still 156.2 MB. Free memory was 138.9 MB in the beginning and 137.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 445.74 ms. Allocated memory is still 156.2 MB. Free memory was 137.3 MB in the beginning and 120.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 595.47 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 70.7 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned a, b; [L24] unsigned x, y, u, v; [L25] a = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(a>=0 && a<=2) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(a>=0 && a<=2) [L27] b = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(b>=0 && b<=2) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(b>=0 && b<=2) [L29] CALL assume_abort_if_not(a >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(a >= 1) [L30] CALL assume_abort_if_not(b >= 1) [L12] COND FALSE !(!cond) [L30] RET assume_abort_if_not(b >= 1) [L32] CALL assume_abort_if_not(a <= 65535) [L12] COND FALSE !(!cond) [L32] RET assume_abort_if_not(a <= 65535) [L33] CALL assume_abort_if_not(b <= 65535) [L12] COND FALSE !(!cond) [L33] RET assume_abort_if_not(b <= 65535) [L35] x = a [L36] y = b [L37] u = b [L38] v = 0 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(x*u + y*v == a*b) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 539.8ms, OverallIterations: 2, TraceHistogramMax: 6, EmptinessCheckTime: 24.8ms, AutomataDifference: 180.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 22 SDslu, 3 SDs, 0 SdLazy, 14 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.1ms 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...