/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/fermat2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:29:48,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:29:48,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:29:48,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:29:48,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:29:48,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:29:48,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:29:48,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:29:48,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:29:48,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:29:48,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:29:48,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:29:48,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:29:48,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:29:48,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:29:48,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:29:48,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:29:48,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:29:48,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:29:48,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:29:48,538 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 12:29:48,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:29:48,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:29:48,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:29:48,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:29:48,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:29:48,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:29:48,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:29:48,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:29:48,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:29:48,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:29:48,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:29:48,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:29:48,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:29:48,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:29:48,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:29:48,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:29:48,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:29:48,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:29:48,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:29:48,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:29:48,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:29:48,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:29:48,561 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:29:48,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:29:48,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:29:48,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:29:48,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:29:48,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:29:48,879 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:29:48,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c [2021-05-06 12:29:48,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c68851cf/b081c6c20cfb4bbfb2fbfde409937652/FLAGf87fbfb3a [2021-05-06 12:29:49,455 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:29:49,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c [2021-05-06 12:29:49,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c68851cf/b081c6c20cfb4bbfb2fbfde409937652/FLAGf87fbfb3a [2021-05-06 12:29:49,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c68851cf/b081c6c20cfb4bbfb2fbfde409937652 [2021-05-06 12:29:49,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:29:49,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:29:49,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:29:49,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:29:49,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:29:49,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:29:49" (1/1) ... [2021-05-06 12:29:49,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771d2761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:49, skipping insertion in model container [2021-05-06 12:29:49,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:29:49" (1/1) ... [2021-05-06 12:29:49,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:29:49,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:29:50,074 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/fermat2-ll_valuebound50.c[524,537] [2021-05-06 12:29:50,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:29:50,093 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:29:50,112 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/fermat2-ll_valuebound50.c[524,537] [2021-05-06 12:29:50,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:29:50,131 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:29:50,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50 WrapperNode [2021-05-06 12:29:50,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:29:50,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:29:50,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:29:50,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:29:50,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ... [2021-05-06 12:29:50,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:29:50,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:29:50,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:29:50,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:29:50,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (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 12:29:50,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:29:50,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:29:50,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:29:50,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:29:50,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:29:50,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:29:50,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:29:50,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:29:50,251 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:29:50,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:29:50,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:29:50,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:29:50,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:29:50,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:29:50,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:29:50,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:29:50,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:29:50,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:29:50,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:29:50,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:29:50,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:29:50,554 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:29:50,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:29:50 BoogieIcfgContainer [2021-05-06 12:29:50,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:29:50,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:29:50,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:29:50,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:29:50,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:29:49" (1/3) ... [2021-05-06 12:29:50,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7c713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:29:50, skipping insertion in model container [2021-05-06 12:29:50,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (2/3) ... [2021-05-06 12:29:50,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7c713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:29:50, skipping insertion in model container [2021-05-06 12:29:50,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:29:50" (3/3) ... [2021-05-06 12:29:50,561 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound50.c [2021-05-06 12:29:50,566 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:29:50,569 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:29:50,583 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:29:50,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:29:50,600 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:29:50,600 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:29:50,600 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:29:50,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:29:50,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:29:50,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:29:50,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:29:50,612 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 12:29:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:29:50,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:29:50,619 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 12:29:50,620 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:29:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:29:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times [2021-05-06 12:29:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:29:50,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179997510] [2021-05-06 12:29:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:29:50,701 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:29:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:50,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:29:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:50,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:29:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:50,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 12:29:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:50,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 12:29:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:50,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 12:29:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:29:50,970 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 12:29:50,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:29:50,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179997510] [2021-05-06 12:29:50,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [179997510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:29:50,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:29:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:29:50,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893637360] [2021-05-06 12:29:50,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:29:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:29:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:29:50,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:29:50,989 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12:29:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:29:51,098 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-05-06 12:29:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:29:51,100 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, (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 33 [2021-05-06 12:29:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:29:51,106 INFO L225 Difference]: With dead ends: 57 [2021-05-06 12:29:51,106 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 12:29:51,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:29:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 12:29:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 12:29:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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 12:29:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-06 12:29:51,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-06 12:29:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:29:51,153 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-06 12:29:51,153 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, (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 12:29:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-06 12:29:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:29:51,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:29:51,164 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 12:29:51,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:29:51,165 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:29:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:29:51,165 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times [2021-05-06 12:29:51,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:29:51,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663285880] [2021-05-06 12:29:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:29:51,168 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:29:51,186 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:29:51,187 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:29:51,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:29:51,200 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:29:51,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:29:51 BoogieIcfgContainer [2021-05-06 12:29:51,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:29:51,204 INFO L168 Benchmark]: Toolchain (without parser) took 1261.07 ms. Allocated memory is still 182.5 MB. Free memory was 147.4 MB in the beginning and 162.5 MB in the end (delta: -15.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:29:51,205 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 182.5 MB. Free memory is still 164.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:29:51,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.79 ms. Allocated memory is still 182.5 MB. Free memory was 147.2 MB in the beginning and 165.8 MB in the end (delta: -18.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:51,206 INFO L168 Benchmark]: Boogie Preprocessor took 45.23 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 164.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:51,207 INFO L168 Benchmark]: RCFGBuilder took 376.14 ms. Allocated memory is still 182.5 MB. Free memory was 164.1 MB in the beginning and 149.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:29:51,208 INFO L168 Benchmark]: TraceAbstraction took 645.67 ms. Allocated memory is still 182.5 MB. Free memory was 148.8 MB in the beginning and 162.5 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:29:51,213 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 182.5 MB. Free memory is still 164.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.79 ms. Allocated memory is still 182.5 MB. Free memory was 147.2 MB in the beginning and 165.8 MB in the end (delta: -18.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.23 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 164.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 376.14 ms. Allocated memory is still 182.5 MB. Free memory was 164.1 MB in the beginning and 149.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 645.67 ms. Allocated memory is still 182.5 MB. Free memory was 148.8 MB in the beginning and 162.5 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int A, R; [L21] long long u, v, r; [L22] A = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(A>=0 && A<=50) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=50) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=50) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=50) [L27] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L29] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A % 2 == 1) [L31] u = ((long long) 2 * R) + 1 [L32] v = 1 [L33] r = ((long long) R * R) - A [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [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: 593.1ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 11.4ms, AutomataDifference: 130.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms 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: 34.4ms 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...