/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_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:25,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:25,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:25,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:25,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:25,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:25,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:25,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:25,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:25,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:25,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:25,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:25,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:25,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:25,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:25,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:25,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:25,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:25,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:25,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:25,683 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 08:24:25,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:25,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:25,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:25,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:25,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:25,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:25,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:25,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:25,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:25,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:25,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:25,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:25,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:25,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:25,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:25,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:25,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:25,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:25,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:25,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:25,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:25,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:25,703 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:25,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:26,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:26,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:26,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:26,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:26,052 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:26,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound1.c [2021-05-01 08:24:26,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677fefe58/0b088294bc4a4d1eb94fef89d91bb8b3/FLAG86ae0de07 [2021-05-01 08:24:26,608 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:26,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound1.c [2021-05-01 08:24:26,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677fefe58/0b088294bc4a4d1eb94fef89d91bb8b3/FLAG86ae0de07 [2021-05-01 08:24:27,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677fefe58/0b088294bc4a4d1eb94fef89d91bb8b3 [2021-05-01 08:24:27,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:27,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:27,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:27,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:27,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:27,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4597803d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27, skipping insertion in model container [2021-05-01 08:24:27,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:27,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:27,217 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_valuebound1.c[560,573] [2021-05-01 08:24:27,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:27,264 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:27,341 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_valuebound1.c[560,573] [2021-05-01 08:24:27,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:27,379 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:27,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27 WrapperNode [2021-05-01 08:24:27,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:27,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:27,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:27,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:27,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (1/1) ... [2021-05-01 08:24:27,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:27,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:27,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:27,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:27,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (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 08:24:27,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:27,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:27,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:27,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:27,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:27,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:24:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:27,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:27,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:27,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:27,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:27,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:27,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:27,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:27,810 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-01 08:24:27,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:27 BoogieIcfgContainer [2021-05-01 08:24:27,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:27,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:27,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:27,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:27,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:27" (1/3) ... [2021-05-01 08:24:27,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34449d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:27, skipping insertion in model container [2021-05-01 08:24:27,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:27" (2/3) ... [2021-05-01 08:24:27,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34449d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:27, skipping insertion in model container [2021-05-01 08:24:27,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:27" (3/3) ... [2021-05-01 08:24:27,819 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound1.c [2021-05-01 08:24:27,824 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:27,827 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:27,839 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:27,856 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:27,856 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:27,856 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:27,856 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:27,856 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:27,856 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:27,857 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:27,857 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:27,869 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 08:24:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:27,876 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:27,877 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 08:24:27,877 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 1 times [2021-05-01 08:24:27,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:27,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477476142] [2021-05-01 08:24:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:27,941 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:24:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 08:24:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 08:24:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:28,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:28,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:28,242 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 08:24:28,244 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:28,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477476142] [2021-05-01 08:24:28,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477476142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:28,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:28,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:28,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249133348] [2021-05-01 08:24:28,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:28,263 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 08:24:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:28,503 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2021-05-01 08:24:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:28,505 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 08:24:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:28,512 INFO L225 Difference]: With dead ends: 73 [2021-05-01 08:24:28,512 INFO L226 Difference]: Without dead ends: 35 [2021-05-01 08:24:28,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-01 08:24:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-01 08:24:28,552 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 08:24:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-01 08:24:28,554 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-01 08:24:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:28,555 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-01 08:24:28,555 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 08:24:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-01 08:24:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:28,557 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:28,557 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 08:24:28,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:28,557 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 1 times [2021-05-01 08:24:28,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:28,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805240296] [2021-05-01 08:24:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:28,562 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:28,594 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:28,594 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:28,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:28,616 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:28,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:28 BoogieIcfgContainer [2021-05-01 08:24:28,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:28,619 INFO L168 Benchmark]: Toolchain (without parser) took 1600.62 ms. Allocated memory is still 194.0 MB. Free memory was 159.3 MB in the beginning and 149.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:28,625 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 194.0 MB. Free memory is still 176.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:28,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.30 ms. Allocated memory is still 194.0 MB. Free memory was 159.2 MB in the beginning and 177.3 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:28,627 INFO L168 Benchmark]: Boogie Preprocessor took 43.14 ms. Allocated memory is still 194.0 MB. Free memory was 177.0 MB in the beginning and 175.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:28,628 INFO L168 Benchmark]: RCFGBuilder took 386.73 ms. Allocated memory is still 194.0 MB. Free memory was 175.6 MB in the beginning and 159.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:28,629 INFO L168 Benchmark]: TraceAbstraction took 804.44 ms. Allocated memory is still 194.0 MB. Free memory was 158.8 MB in the beginning and 149.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:28,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 194.0 MB. Free memory is still 176.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 357.30 ms. Allocated memory is still 194.0 MB. Free memory was 159.2 MB in the beginning and 177.3 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.14 ms. Allocated memory is still 194.0 MB. Free memory was 177.0 MB in the beginning and 175.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 386.73 ms. Allocated memory is still 194.0 MB. Free memory was 175.6 MB in the beginning and 159.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 804.44 ms. Allocated memory is still 194.0 MB. Free memory was 158.8 MB in the beginning and 149.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.0 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<=1) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(a>=0 && a<=1) [L27] b = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(b>=0 && b<=1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(b>=0 && b<=1) [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: 748.7ms, OverallIterations: 2, TraceHistogramMax: 6, EmptinessCheckTime: 11.9ms, AutomataDifference: 263.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 22 SDslu, 3 SDs, 0 SdLazy, 14 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 137.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.0ms 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: 27.6ms 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...