/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/lcm2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:30,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:30,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:30,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:30,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:30,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:30,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:30,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:30,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:30,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:30,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:30,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:30,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:30,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:30,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:30,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:30,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:30,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:24:30,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:24:30,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:24:30,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:24:30,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:24:30,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:24:30,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:24:30,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:24:30,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:30,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:30,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:30,183 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 08:24:30,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:30,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:30,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:30,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:30,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:30,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:30,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:30,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:30,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:30,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:30,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:30,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:30,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:30,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:30,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:30,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:30,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:30,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:30,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:30,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:30,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:30,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:30,212 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:30,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:30,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:30,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:30,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:30,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:30,628 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:30,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c [2021-05-01 08:24:30,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85df3b702/a7eeb64665e24697be24e8340417bbc0/FLAG8ef5da7f0 [2021-05-01 08:24:31,259 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:31,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c [2021-05-01 08:24:31,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85df3b702/a7eeb64665e24697be24e8340417bbc0/FLAG8ef5da7f0 [2021-05-01 08:24:31,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85df3b702/a7eeb64665e24697be24e8340417bbc0 [2021-05-01 08:24:31,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:31,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:31,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:31,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:31,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:31,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc9700e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31, skipping insertion in model container [2021-05-01 08:24:31,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:31,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:31,758 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/lcm2_unwindbound10.c[545,558] [2021-05-01 08:24:31,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:31,787 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:31,814 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/lcm2_unwindbound10.c[545,558] [2021-05-01 08:24:31,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:31,848 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:31,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31 WrapperNode [2021-05-01 08:24:31,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:31,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:31,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:31,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:31,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... [2021-05-01 08:24:31,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:31,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:31,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:31,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:31,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:32,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:32,105 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:24:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:32,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:32,470 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:24:32,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:32 BoogieIcfgContainer [2021-05-01 08:24:32,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:32,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:32,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:32,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:32,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:31" (1/3) ... [2021-05-01 08:24:32,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619c3483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:32, skipping insertion in model container [2021-05-01 08:24:32,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:31" (2/3) ... [2021-05-01 08:24:32,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619c3483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:32, skipping insertion in model container [2021-05-01 08:24:32,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:32" (3/3) ... [2021-05-01 08:24:32,501 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound10.c [2021-05-01 08:24:32,508 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:32,531 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:32,567 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:32,612 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:32,613 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:32,613 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:32,613 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:32,613 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:32,613 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:32,613 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:32,613 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 08:24:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-01 08:24:32,650 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:32,651 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:32,651 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2021-05-01 08:24:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:32,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990300436] [2021-05-01 08:24:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:32,746 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:32,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:32,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:32,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:32,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:24:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-01 08:24:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-01 08:24:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-01 08:24:33,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:33,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990300436] [2021-05-01 08:24:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990300436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:33,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:33,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:33,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658255478] [2021-05-01 08:24:33,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:33,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:33,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:33,198 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-01 08:24:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:33,452 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2021-05-01 08:24:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-01 08:24:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:33,463 INFO L225 Difference]: With dead ends: 58 [2021-05-01 08:24:33,464 INFO L226 Difference]: Without dead ends: 28 [2021-05-01 08:24:33,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-01 08:24:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-01 08:24:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 08:24:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-01 08:24:33,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2021-05-01 08:24:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:33,515 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-01 08:24:33,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-01 08:24:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-01 08:24:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 08:24:33,517 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:33,518 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:33,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:33,518 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2021-05-01 08:24:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:33,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183075907] [2021-05-01 08:24:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:33,537 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:33,557 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:33,557 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:33,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:33,582 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:33,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:33 BoogieIcfgContainer [2021-05-01 08:24:33,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:33,584 INFO L168 Benchmark]: Toolchain (without parser) took 2002.39 ms. Allocated memory is still 181.4 MB. Free memory was 147.5 MB in the beginning and 161.5 MB in the end (delta: -13.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:33,585 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 181.4 MB. Free memory is still 164.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:33,585 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.54 ms. Allocated memory is still 181.4 MB. Free memory was 147.3 MB in the beginning and 137.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:33,586 INFO L168 Benchmark]: Boogie Preprocessor took 57.74 ms. Allocated memory is still 181.4 MB. Free memory was 137.4 MB in the beginning and 135.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:33,586 INFO L168 Benchmark]: RCFGBuilder took 563.23 ms. Allocated memory is still 181.4 MB. Free memory was 135.8 MB in the beginning and 151.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:33,587 INFO L168 Benchmark]: TraceAbstraction took 1088.89 ms. Allocated memory is still 181.4 MB. Free memory was 150.6 MB in the beginning and 161.5 MB in the end (delta: -10.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:33,589 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 181.4 MB. Free memory is still 164.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.54 ms. Allocated memory is still 181.4 MB. Free memory was 147.3 MB in the beginning and 137.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.74 ms. Allocated memory is still 181.4 MB. Free memory was 137.4 MB in the beginning and 135.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 563.23 ms. Allocated memory is still 181.4 MB. Free memory was 135.8 MB in the beginning and 151.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1088.89 ms. Allocated memory is still 181.4 MB. Free memory was 150.6 MB in the beginning and 161.5 MB in the end (delta: -10.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L19] int counter = 0; [L21] unsigned a, b; [L22] unsigned x, y, u, v; [L23] a = __VERIFIER_nondet_unsigned_int() [L24] b = __VERIFIER_nondet_unsigned_int() [L25] CALL assume_abort_if_not(a >= 1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a >= 1) [L26] CALL assume_abort_if_not(b >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(b >= 1) [L28] CALL assume_abort_if_not(a <= 65535) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a <= 65535) [L29] CALL assume_abort_if_not(b <= 65535) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(b <= 65535) [L31] x = a [L32] y = b [L33] u = b [L34] v = a [L36] EXPR counter++ [L36] COND FALSE !(counter++<10) [L51] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 957.1ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 24.8ms, AutomataDifference: 290.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 18 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 126.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.2ms 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: 30.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...