/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -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-6253b08 [2021-05-06 12:32:36,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:32:36,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:32:36,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:32:36,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:32:36,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:32:36,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:32:36,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:32:36,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:32:36,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:32:36,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:32:36,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:32:36,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:32:36,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:32:36,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:32:36,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:32:36,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:32:36,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:32:36,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:32:36,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:32:36,123 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:32:36,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:32:36,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:32:36,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:32:36,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:32:36,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:32:36,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:32:36,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:32:36,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:32:36,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:32:36,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:32:36,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:32:36,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:32:36,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:32:36,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:32:36,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:32:36,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:32:36,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:32:36,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:32:36,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:32:36,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:32:36,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:32:36,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:32:36,142 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:32:36,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:32:36,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:32:36,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:32:36,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:32:36,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:32:36,425 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:32:36,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c [2021-05-06 12:32:36,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56886d488/c2a9904176b744559a89939fa14d0cfb/FLAG09a4d99b4 [2021-05-06 12:32:36,819 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:32:36,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound10.c [2021-05-06 12:32:36,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56886d488/c2a9904176b744559a89939fa14d0cfb/FLAG09a4d99b4 [2021-05-06 12:32:36,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56886d488/c2a9904176b744559a89939fa14d0cfb [2021-05-06 12:32:36,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:32:36,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:32:36,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:32:36,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:32:36,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:32:36,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:32:36" (1/1) ... [2021-05-06 12:32:36,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abff8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:36, skipping insertion in model container [2021-05-06 12:32:36,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:32:36" (1/1) ... [2021-05-06 12:32:36,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:32:36,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:32:36,979 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] [2021-05-06 12:32:36,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:32:37,001 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:32:37,015 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] [2021-05-06 12:32:37,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:32:37,043 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:32:37,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37 WrapperNode [2021-05-06 12:32:37,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:32:37,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:32:37,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:32:37,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:32:37,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (1/1) ... [2021-05-06 12:32:37,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:32:37,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:32:37,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:32:37,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:32:37,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (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 [2021-05-06 12:32:37,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:32:37,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:32:37,159 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:32:37,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:32:37,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:32:37,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:32:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:32:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:32:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:32:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:32:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 12:32:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:32:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:32:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:32:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:32:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:32:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:32:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:32:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:32:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:32:37,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:32:37,371 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:32:37,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:32:37 BoogieIcfgContainer [2021-05-06 12:32:37,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:32:37,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:32:37,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:32:37,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:32:37,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:32:36" (1/3) ... [2021-05-06 12:32:37,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0ed5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:32:37, skipping insertion in model container [2021-05-06 12:32:37,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:37" (2/3) ... [2021-05-06 12:32:37,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0ed5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:32:37, skipping insertion in model container [2021-05-06 12:32:37,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:32:37" (3/3) ... [2021-05-06 12:32:37,377 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound10.c [2021-05-06 12:32:37,381 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:32:37,383 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:32:37,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:32:37,432 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:32:37,432 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:32:37,432 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:32:37,432 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:32:37,432 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:32:37,433 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:32:37,433 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:32:37,433 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:32:37,455 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) [2021-05-06 12:32:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 12:32:37,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:37,462 INFO L523 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] [2021-05-06 12:32:37,462 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2021-05-06 12:32:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:37,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937344297] [2021-05-06 12:32:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:37,528 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:37,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:32:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:37,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:32:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:37,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:32:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:37,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-06 12:32:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:37,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 12:32:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 12:32:37,760 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:32:37,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937344297] [2021-05-06 12:32:37,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937344297] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:32:37,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:32:37,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:32:37,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533695827] [2021-05-06 12:32:37,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:32:37,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:32:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:32:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:32:37,777 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) [2021-05-06 12:32:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:32:37,900 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2021-05-06 12:32:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:32:37,902 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 [2021-05-06 12:32:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:32:37,907 INFO L225 Difference]: With dead ends: 58 [2021-05-06 12:32:37,907 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 12:32:37,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:32:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 12:32:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 12:32:37,950 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) [2021-05-06 12:32:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 12:32:37,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2021-05-06 12:32:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:32:37,952 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 12:32:37,952 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) [2021-05-06 12:32:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 12:32:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:32:37,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:37,954 INFO L523 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] [2021-05-06 12:32:37,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:32:37,955 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2021-05-06 12:32:37,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:37,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011037807] [2021-05-06 12:32:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:37,960 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:37,990 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:32:37,990 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:32:37,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:32:38,002 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:32:38,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:32:38 BoogieIcfgContainer [2021-05-06 12:32:38,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:32:38,003 INFO L168 Benchmark]: Toolchain (without parser) took 1160.56 ms. Allocated memory is still 234.9 MB. Free memory was 200.9 MB in the beginning and 159.8 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:38,003 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 234.9 MB. Free memory was 217.3 MB in the beginning and 217.2 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:32:38,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.07 ms. Allocated memory is still 234.9 MB. Free memory was 200.7 MB in the beginning and 219.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:38,004 INFO L168 Benchmark]: Boogie Preprocessor took 53.23 ms. Allocated memory is still 234.9 MB. Free memory was 218.5 MB in the beginning and 216.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:38,004 INFO L168 Benchmark]: RCFGBuilder took 268.70 ms. Allocated memory is still 234.9 MB. Free memory was 216.9 MB in the beginning and 201.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:38,005 INFO L168 Benchmark]: TraceAbstraction took 629.02 ms. Allocated memory is still 234.9 MB. Free memory was 200.6 MB in the beginning and 159.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:38,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 234.9 MB. Free memory was 217.3 MB in the beginning and 217.2 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 198.07 ms. Allocated memory is still 234.9 MB. Free memory was 200.7 MB in the beginning and 219.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.23 ms. Allocated memory is still 234.9 MB. Free memory was 218.5 MB in the beginning and 216.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 268.70 ms. Allocated memory is still 234.9 MB. Free memory was 216.9 MB in the beginning and 201.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 629.02 ms. Allocated memory is still 234.9 MB. Free memory was 200.6 MB in the beginning and 159.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 40.9 MB. 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: 563.2ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 8.5ms, AutomataDifference: 143.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 18 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms 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: 32.8ms 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...