/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/prod4br-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:09:32,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:09:32,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:09:32,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:09:32,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:09:32,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:09:32,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:09:32,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:09:32,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:09:32,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:09:32,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:09:32,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:09:32,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:09:32,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:09:32,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:09:32,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:09:32,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:09:32,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:09:32,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:09:32,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:09:32,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:09:32,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:09:32,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:09:32,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:09:32,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:09:32,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:09:32,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:09:32,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:09:32,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:09:32,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:09:32,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:09:32,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:09:32,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:09:32,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:09:32,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:09:32,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:09:32,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:09:32,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:09:32,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:09:32,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:09:32,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:09:32,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:09:32,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:09:32,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:09:32,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:09:32,715 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:09:32,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:09:33,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:09:33,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:09:33,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:09:33,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:09:33,057 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:09:33,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound2.c [2021-04-16 08:09:33,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8798cfc/6fa95b49aa6b407ab08f0dc6639331a3/FLAG5e2d29e8f [2021-04-16 08:09:33,759 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:09:33,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound2.c [2021-04-16 08:09:33,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8798cfc/6fa95b49aa6b407ab08f0dc6639331a3/FLAG5e2d29e8f [2021-04-16 08:09:34,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8798cfc/6fa95b49aa6b407ab08f0dc6639331a3 [2021-04-16 08:09:34,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:09:34,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:09:34,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:09:34,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:09:34,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:09:34,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d07595b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34, skipping insertion in model container [2021-04-16 08:09:34,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:09:34,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:09:34,220 WARN L226 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/prod4br-ll_valuebound2.c[524,537] [2021-04-16 08:09:34,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:09:34,248 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:09:34,288 WARN L226 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/prod4br-ll_valuebound2.c[524,537] [2021-04-16 08:09:34,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:09:34,322 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:09:34,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34 WrapperNode [2021-04-16 08:09:34,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:09:34,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:09:34,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:09:34,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:09:34,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (1/1) ... [2021-04-16 08:09:34,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:09:34,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:09:34,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:09:34,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:09:34,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (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 [2021-04-16 08:09:34,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:09:34,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:09:34,459 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:09:34,460 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:09:34,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:09:34,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:09:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:09:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:09:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:09:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:09:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:09:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:09:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:09:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:09:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:09:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:09:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:09:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:09:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:09:34,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:09:34,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:09:34,720 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 08:09:34,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:09:34 BoogieIcfgContainer [2021-04-16 08:09:34,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:09:34,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:09:34,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:09:34,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:09:34,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:09:34" (1/3) ... [2021-04-16 08:09:34,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224f400c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:09:34, skipping insertion in model container [2021-04-16 08:09:34,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:09:34" (2/3) ... [2021-04-16 08:09:34,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224f400c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:09:34, skipping insertion in model container [2021-04-16 08:09:34,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:09:34" (3/3) ... [2021-04-16 08:09:34,741 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound2.c [2021-04-16 08:09:34,746 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:09:34,750 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:09:34,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:09:34,783 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:09:34,783 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:09:34,783 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:09:34,783 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:09:34,783 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:09:34,783 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:09:34,783 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:09:34,784 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:09:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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) [2021-04-16 08:09:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:09:34,810 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:09:34,810 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:09:34,811 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:09:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:09:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2021-04-16 08:09:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:09:34,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787770309] [2021-04-16 08:09:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:09:34,907 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:09:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:09:35,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:09:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:09:35,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:09:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:09:35,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:09:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:09:35,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:09:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:09:35,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:09:35,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:09:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:09:35,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787770309] [2021-04-16 08:09:35,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:09:35,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:09:35,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885747955] [2021-04-16 08:09:35,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:09:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:09:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:09:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:09:35,142 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:09:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:09:35,279 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-04-16 08:09:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:09:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-04-16 08:09:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:09:35,290 INFO L225 Difference]: With dead ends: 61 [2021-04-16 08:09:35,290 INFO L226 Difference]: Without dead ends: 29 [2021-04-16 08:09:35,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:09:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-04-16 08:09:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-04-16 08:09:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-04-16 08:09:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-04-16 08:09:35,366 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2021-04-16 08:09:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:09:35,366 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-04-16 08:09:35,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:09:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-04-16 08:09:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:09:35,370 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:09:35,371 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:09:35,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:09:35,372 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:09:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:09:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2021-04-16 08:09:35,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:09:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152012148] [2021-04-16 08:09:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:09:35,387 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:09:35,422 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:09:35,422 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:09:35,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:09:35,441 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:09:35,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:09:35 BoogieIcfgContainer [2021-04-16 08:09:35,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:09:35,445 INFO L168 Benchmark]: Toolchain (without parser) took 1392.17 ms. Allocated memory is still 188.7 MB. Free memory was 155.1 MB in the beginning and 114.4 MB in the end (delta: 40.7 MB). Peak memory consumption was 40.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:09:35,447 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 188.7 MB. Free memory is still 171.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:09:35,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.50 ms. Allocated memory is still 188.7 MB. Free memory was 155.0 MB in the beginning and 172.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:09:35,448 INFO L168 Benchmark]: Boogie Preprocessor took 47.53 ms. Allocated memory is still 188.7 MB. Free memory was 172.1 MB in the beginning and 170.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:09:35,449 INFO L168 Benchmark]: RCFGBuilder took 349.29 ms. Allocated memory is still 188.7 MB. Free memory was 170.5 MB in the beginning and 154.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:09:35,450 INFO L168 Benchmark]: TraceAbstraction took 719.14 ms. Allocated memory is still 188.7 MB. Free memory was 153.7 MB in the beginning and 114.4 MB in the end (delta: 39.3 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:09:35,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 188.7 MB. Free memory is still 171.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.50 ms. Allocated memory is still 188.7 MB. Free memory was 155.0 MB in the beginning and 172.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.53 ms. Allocated memory is still 188.7 MB. Free memory was 172.1 MB in the beginning and 170.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 349.29 ms. Allocated memory is still 188.7 MB. Free memory was 170.5 MB in the beginning and 154.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 719.14 ms. Allocated memory is still 188.7 MB. Free memory was 153.7 MB in the beginning and 114.4 MB in the end (delta: 39.3 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 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: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x>=0 && x<=2) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x>=0 && x<=2) [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y>=0 && y<=2) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y>=0 && y<=2) [L27] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(y >= 1) [L29] a = x [L30] b = y [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 647.5ms, OverallIterations: 2, TraceHistogramMax: 3, EmptinessCheckTime: 13.1ms, AutomataDifference: 164.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 22 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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: 57.4ms 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...