/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/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:22:21,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:22:21,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:22:21,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 08:22:21,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 08:22:21,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 08:22:21,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 08:22:21,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 08:22:21,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 08:22:21,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 08:22:21,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 08:22:21,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 08:22:21,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:22:21,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:22:21,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:22:21,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:22:21,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:22:21,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:22:21,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:22:21,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:22:21,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:22:21,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:22:21,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:22:21,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:22:21,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:22:21,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:22:21,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:22:21,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:22:21,482 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 08:22:21,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:22:21,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:22:21,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:22:21,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:22:21,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:22:21,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:22:21,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:22:21,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:22:21,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:22:21,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:22:21,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:22:21,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:22:21,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:22:21,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:22:21,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:22:21,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:22:21,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:22:21,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:22:21,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:22:21,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:22:21,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:22:21,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:22:21,523 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:22:21,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:22:21,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:22:21,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:22:21,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:22:21,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:22:21,857 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:22:21,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2021-05-01 08:22:21,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1e953526/f0d3a692083141b682b11606d6c397c1/FLAGa5b9cb23e [2021-05-01 08:22:22,490 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:22:22,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2021-05-01 08:22:22,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1e953526/f0d3a692083141b682b11606d6c397c1/FLAGa5b9cb23e [2021-05-01 08:22:22,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1e953526/f0d3a692083141b682b11606d6c397c1 [2021-05-01 08:22:22,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:22:22,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:22:22,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:22,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:22:22,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:22:22,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:22" (1/1) ... [2021-05-01 08:22:22,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1854b564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:22, skipping insertion in model container [2021-05-01 08:22:22,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:22" (1/1) ... [2021-05-01 08:22:22,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:22:22,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:22:23,099 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/egcd2-ll_unwindbound20.c[490,503] [2021-05-01 08:22:23,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:22:23,129 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:22:23,140 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/egcd2-ll_unwindbound20.c[490,503] [2021-05-01 08:22:23,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:22:23,167 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:22:23,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23 WrapperNode [2021-05-01 08:22:23,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:23,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:22:23,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:22:23,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:22:23,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (1/1) ... [2021-05-01 08:22:23,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:22:23,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:22:23,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:22:23,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:22:23,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (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 08:22:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:22:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:22:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:22:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:22:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:22:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:22:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:22:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:22:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:22:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:22:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:22:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:22:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:22:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:22:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:22:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:22:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:22:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:22:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:22:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:22:23,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:22:23,636 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:22:23,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:23 BoogieIcfgContainer [2021-05-01 08:22:23,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:22:23,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:22:23,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:22:23,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:22:23,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:22:22" (1/3) ... [2021-05-01 08:22:23,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3beb23fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:23, skipping insertion in model container [2021-05-01 08:22:23,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:23" (2/3) ... [2021-05-01 08:22:23,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3beb23fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:23, skipping insertion in model container [2021-05-01 08:22:23,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:23" (3/3) ... [2021-05-01 08:22:23,647 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2021-05-01 08:22:23,653 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:22:23,658 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:22:23,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:22:23,727 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:22:23,727 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:22:23,727 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:22:23,727 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:22:23,728 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:22:23,728 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:22:23,728 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:22:23,728 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:22:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-01 08:22:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-01 08:22:23,752 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:22:23,753 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 08:22:23,754 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:22:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:22:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-01 08:22:23,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:22:23,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355023138] [2021-05-01 08:22:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:22:23,855 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:22:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:24,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:22:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:24,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:22:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:24,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:22:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:24,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:22:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:24,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:22:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:22:24,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:22:24,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:22:24,145 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 08:22:24,152 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:22:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355023138] [2021-05-01 08:22:24,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355023138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:22:24,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:22:24,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:22:24,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325626263] [2021-05-01 08:22:24,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:22:24,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:22:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:22:24,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:22:24,177 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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 08:22:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:22:24,449 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-01 08:22:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:22:24,452 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 08:22:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:22:24,464 INFO L225 Difference]: With dead ends: 72 [2021-05-01 08:22:24,464 INFO L226 Difference]: Without dead ends: 35 [2021-05-01 08:22:24,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:22:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-01 08:22:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-01 08:22:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-01 08:22:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-01 08:22:24,519 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-01 08:22:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:22:24,519 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-01 08:22:24,520 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 08:22:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-01 08:22:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-01 08:22:24,522 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:22:24,522 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 08:22:24,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:22:24,523 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:22:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:22:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-01 08:22:24,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:22:24,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131463637] [2021-05-01 08:22:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:22:24,527 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:22:24,541 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:22:24,542 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:22:24,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:22:24,561 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:22:24,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:22:24 BoogieIcfgContainer [2021-05-01 08:22:24,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:22:24,564 INFO L168 Benchmark]: Toolchain (without parser) took 1617.99 ms. Allocated memory is still 240.1 MB. Free memory was 206.5 MB in the beginning and 208.3 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:24,564 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 240.1 MB. Free memory is still 223.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:24,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.16 ms. Allocated memory is still 240.1 MB. Free memory was 206.2 MB in the beginning and 196.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:24,565 INFO L168 Benchmark]: Boogie Preprocessor took 80.28 ms. Allocated memory is still 240.1 MB. Free memory was 195.9 MB in the beginning and 223.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:24,565 INFO L168 Benchmark]: RCFGBuilder took 388.01 ms. Allocated memory is still 240.1 MB. Free memory was 223.8 MB in the beginning and 206.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:22:24,566 INFO L168 Benchmark]: TraceAbstraction took 922.61 ms. Allocated memory is still 240.1 MB. Free memory was 206.4 MB in the beginning and 208.3 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:22:24,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 240.1 MB. Free memory is still 223.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 219.16 ms. Allocated memory is still 240.1 MB. Free memory was 206.2 MB in the beginning and 196.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.28 ms. Allocated memory is still 240.1 MB. Free memory was 195.9 MB in the beginning and 223.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 388.01 ms. Allocated memory is still 240.1 MB. Free memory was 223.8 MB in the beginning and 206.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 922.61 ms. Allocated memory is still 240.1 MB. Free memory was 206.4 MB in the beginning and 208.3 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L37] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(xy < 2147483647) [L38] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(yy < 2147483647) [L40] EXPR counter++ [L40] COND FALSE !(counter++<20) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 822.9ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 15.3ms, AutomataDifference: 305.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 26 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 139.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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: 35.1ms 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...